MVD signals document

MVD SIGNALS DOCUMENT

This is an HTML copy of the MVD's so-called 'signals document'. Check with the original PDF version before using numbers from here, to make sure this translation is up-to-date. 26 Mar 98 HvH

Jump down to:

  1. MCM Output Cable Signals
  2. Power/Communication Circuit Board Signals
  3. MCM to Power/Comm daughter Board
  4. Power Communication Circuit Board/Motherboard Signals
  5. MVD Endplate Connections - A. DC Power
  6. MVD Endplate Connections - B. Silicon Bias 1
  7. MVD Endplate Connections - B. Silicon Bias 2
  8. MVD Endplate Connections - C. Analog Sum Outputs Connector
  9. MVD Endplate Connections - D. Timing Signal Connectors
  10. MVD Endplate Connections - E. Serial/Control Signal Connectors
  11. MVD Endplate Connections - F. LVDS Outputs
  12. MVD Endplate Connections - G. Monitoring Signals

Signal Assignments for MVD Connectors and Cables

Jan Boissevain/Sangkoo Hahn/Roy Cope

PHENIX-MVD-98-20, PHENIX note 349

Revision History:

Nov. 20, 1997----updated Monitor Signals (Section 7) to reflect the new serial readout scheme for MCM temperature, LDO voltage and AMU spy channel. )

Feb. 23, 1997----There is no change in pin assignments since last revision, but many signal names have been unified for better consistency within this document as well as between this document and the circuit schematics for MCM, Power-Comm board and Motherboard. Some of the names were left alone when they were easily identified as straight initials or shortening of names i.e. Serial Enable <-> SE, clk <-> clock, etc.

1. MCM Output Cable Signals Types

(The following list, while not a pin-assignment, makes the signal types more readily recognizable.)
Silicon Detector Bias and Return 2
Analog Power and Return 9
Digital Power and Return 10
MCM Temperature Monitor 1
Current Sum Output (discriminator) 2
Serial Link Signals 6
Xilinx Program (input to MCM) 1
MCM Reset 1
Preamp/AMUADC Out (spy channels) 2
9.5MHz/38MHz CLK 2
Mode Bits 6
Level-1 Accept 1
PECL Clock (A/B) for ADC 2
MCM_DATA_OUT & CLK (LVDS) 3
((spare) pin) 1
(no connection) 1
50 Total

2. Power-Communication Board Signal Types

(The following list, while not a pin-assignment, makes the signal types more readily recognizable.)
Silicon Detector Bias and Return 12
Analog Power and Return 20
Digital Power and Return 38
MCM Temperature Monitors 6
Current Sum Outputs 6
9.5MHz/38MHz CLK 2
Mode Bits 6
Level-1 Accept 1
Serial Link Signals 16
Xilinx Program (input to MCM) 1
MCM Reset 1
Preamp/AMUADC Out (spy channel) 12
PECL Clock (A/B) for ADC 2
MCM_DATA_OUT_and CLK (LVDS) 36
Board temperature monitor 1
160 Total

3. MCM to Power Communication (or Daughter) Board Pin Assignments

MCM Output Cable Connector (1ea Elco 50-contact, .5mm pitch surface mount horizontal ZIF, 0.4 amp, model # 04-6240-050-003-800)

1. sil_bias (silicon detector bias)
2. (no connection, no trace)
3. sil_bias_return (silicon bias return)
4. +5V analog, tgv preamp
5. analog gnd, tgv, amu, isum amp
6. ((spare)) (grounded on power-comm board)
7. discr sum out
8. discr sum out gnd
9. +5V analog: comparator
10. analog gnd, comparator
11. +5Vanalog, amu, isum amp
12. analog gnd, tgv, amu, isum amp
13. - 5V analog, isum amp
14. +2.5V, Vmid
15. mcm temp sensor
16. preamp spy
17. analog gnd, tgv, amu, isum amp
18. amu spy
19. serial enable ;SEN
20. read back enable ;RBEN (enables mirror register read back)
21. serial clock ;SCLK (XCLK)
22. serial data in ;SDIN (XDIN)
23. serial data out ;SDOUT (xilinx done when PROG asserted)
24. serial latch ;SLATCH
25. xilinx program ;PROGB (clears FPGA program)
26. mcm_rst ;MCMRST (resets all data registers)
27. +V, digital, HM & ADC
28. digital gnd, HM & ADC
29. +5V, digital, HM & ADC
30. digital gnd, HM & ADC
31. mode bit 0
32. mode bit 1
33. mode bit 2
34. mode bit 3
35. mode bit 4
36. mode bit 5
37. lvl-1 accept
38. digital gnd
39. mcm_DATA_OUT_clock ;4X Beam Clock
40. digital gnd
41. MCM_DATA_OUT_1 ;serial data link #1
42. digital gnd
43. MCM_DATA_OUT_2 ;serial data link #2
44. digital gnd
45. 9.5 MHz beam clock
46. digital gnd
47. 38 MHz clock ;4X Beam Clock
48. Digital Gnd
49. PECL clock A ;for ADC
50. PECL clock B ;for ADC

Note: 40 Mbit/sec MCM data and clock go to LVDS chips which are mounted on the Power/Communication circuit board (or Daughter board).

4. Power Communication Board to Motherboard Pin Assignments

JAE KX15-160-NLNL Right Angle, 160 contact (2 x 80), .8mm spacing, 0.5 amp. current capacity (mating connector on motherboard: JAE KX14-160-N5D)

1. MB0 ;mode bit 0 2. MB1 ;mode bit 1
3. MB2 ;mode bit 2 4. MB3 ;mode bit 3
5. MB4 ;mode bit 4 6. MB5 ;mode bit 5
7. digital gnd 8. digital gnd
9. L1A ;level 1 accept 10. 9.5 MHz beam clock
11. digital gnd 12. digital gnd
13. PECL_DIFF_CLK A 14. 38 MHz clock (4 X beam clock)
15. PECL_DIFF_CLK B 16. digital gnd
17. MCM1 LVDS_DATA_OUT_CLK_A 18. MCM1 LVDS_DATA_OUT_1A
19. MCM1 LVDS_DATA_OUT_CLK_B 20. MCM1 LVDS_DATA_OUT_1B
21. MCM1 LVDS_DATA_OUT_2A 22. MCM2 LVDS_DATA_OUT_CLK_A
23. MCM1 LVDS_DATA_OUT_2B 24. MCM2 LVDS_DATA_OUT_CLK_B
25. MCM2 LVDS_DATA_OUT_1A 26. MCM2 LVDS_DATA_OUT_2A
27. MCM2 LVDS_DATA_OUT_1B 28. MCM2 LVDS_DATA_OUT_2B
29. MCM3 LVDS_DATA_OUT_CLK_A 30. MCM3 LVDS_DATA_OUT_1A
31. MCM3 LVDS_DATA_OUT_CLK_B 32. MCM3 LVDS_DATA_OUT_1B
33. MCM3 LVDS_DATA_OUT_2A 34. MCM4 LVDS_DATA_OUT_CLK_A
35. MCM3 LVDS_DATA_OUT_2B 36. MCM4 LVDS_DATA_OUT_CLK_B
37. MCM4 LVDS_DATA_OUT_1A 38. MCM4 LVDS_DATA_OUT_2A
39. MCM4 LVDS_DATA_OUT_1B 40. MCM4 LVDS_DATA_OUT_2B
41. MCM5 LVDS_DATA_OUT_CLK_A 42. MCM5 LVDS_DATA_OUT_1A
43. MCM5 LVDS_DATA_OUT_CLK_B 44. MCM5 LVDS_DATA_OUT_1B
45. MCM5 LVDS_DATA_OUT_2A 46. MCM6 LVDS_DATA_OUT_CLK_A
47. MCM5 LVDS_DATA_OUT_2B 48. MCM6 LVDS_DATA_OUT_CLK_B
49. MCM6 LVDS_DATA_OUT_1A 50. MCM6 LVDS_DATA_OUT_2A
51. MCM6 LVDS_DATA_OUT_1B 52. MCM6 LVDS_DATA_OUT_2B
53. digital gnd 54. digital gnd
55. mcm 1 serial enable 56. mcm 2 serial enable
57. mcm 3 serial enable 58. mcm 4 serial enable
59. mcm 5 serial enable 60. mcm 6 serial enable
61. digital gnd 62. digital gnd
63. serial clock 64. serial data in
65. digital gnd 66. digital gnd
67. serial_DATA_OUT_mcm1 68. serial_DATA_OUT_mcm2
69. serial_DATA_OUT_mcm3 70. serial_DATA_OUT_mcm4
71. serial_DATA_OUT_mcm5 72. serial_DATA_OUT_mcm6
73. digital gnd 74. digital gnd
75. serial latch 76. read back enable
77. xilinx program 78. mcm_rst
79. power/comm. board temperature 80. analog gnd
81. mcm 1 preamp out spy 82. mcm 1 amu out spy
83. mcm 2 preamp out spy 84. mcm 2 amu out spy
85. mcm 3 preamp out spy 86. mcm 3 amu out spy
87. mcm 4 preamp out spy 88. mcm 4 amu out spy
89. mcm 5 preamp out spy 90. mcm 5 amu out spy
91. mcm 6 preamp out spy 92. mcm 6 amu out spy
93. analog gnd 94. analog gnd
95. mcm1 discr sum 96. mcm2 discr sum
97. mcm3 discr sum 98. mcm4 discr sum
99. mcm5 discr sum 100. mcm6 discr sum
101. digital gnd, mcm 1 102. digital gnd, mcm 1
103. +5V, digital, HM & ADC, mcm 1 104. +5V, digital, HM & ADC, mcm 1
105. digital gnd, mcm2 106. analog gnd, comparator, mcm 1, 2
107. +5V, digital, HM & ADC, mcm 2 108. +5V, analog, comparator, mcm 1, 2
109. digital gnd, mcm2 110. analog gnd, comparator, mcm 3, 4
111. +5V, digital, HM & ADC, mcm 2 112. +5V, analog, comparator, mcm 3, 4
113. digital gnd, mcm3 114. analog gnd, comparator, mcm 5, 6
115. +5V, digital, HM & ADC, mcm 3 116. +5V, analog, discr, mcm 5, 6
117. digital gnd, mcm3 118. analog gnd, TGV, AMU, mcm 1, 2
119. +5V, digital, HM & ADC, mcm 3 120. +5V, analog, TGV, AMU, mcm 1, 2
121. digital gnd, mcm4 122. analog gnd, TGV, AMU, mcm 3, 4
123. +5V, digital, HM & ADC, mcm 4 124. +5V, analog, TGV, AMU, mcm 3, 4
125. digital gnd, mcm4 126. analog gnd, TGV, AMU, mcm 5, 6
127. +5V, digital, HM & ADC, mcm 4 128. +5V, analog, TGV, AMU, mcm 5, 6
129. digital gnd, mcm5 130. -5V, analog, isum amp, mcm 1, 2
131. +5V, digital, HM & ADC, mcm 5 132. -5V, analog, isum amp, mcm 3, 4
133. digital gnd, mcm5 134. -5V, analog, isum amp, mcm 5, 6
135. +5V, digital, HM & ADC, mcm 5 136. +2.5V, Vmid, mcm 1, 2
137. digital gnd, mcm6 138. +2.5V, Vmid, mcm 3, 4
139. +5V, digital, HM & ADC, mcm 6 140. +2.5V, Vmid, mcm 5, 6
141. digital gnd, mcm6 142. MCM1 temperature monitor
143. +5V, digital, HM & ADC, mcm 6 144. MCM2 temperature monitor
145. MCM3 temperature monitor 146. MCM4 temperature monitor
147. MCM5 temperature monitor 148. MCM6 temperature monitor
149. silicon_bias, mcm 1 150. silicon bias return, mcm 1
151. silicon_bias, mcm 2 152. silicon bias return, mcm 2
153. silicon_bias, mcm 3 154. silicon bias return, mcm 3
155. silicon_bias, mcm 4 156. silicon bias return, mcm 4
157. silicon_bias, mcm 5 158. silicon bias return, mcm 5
159. silicon_bias, mcm 6 160. silicon bias return, mcm 6
Note:

* PECL clock distribution circuit is on Power-Communications Circuit Board

5. MVD Endplate Pin Assignments

A. DC Power

Panduit MAS-CON IDC: 10 contact, 8 amp contact rating, (.156 pitch), and 18-gauge wire. Header (MLSS156-10TA): 31.7mm x 3.7mm x 3.2mm high Right Angle Plug (CT156F18-10): 31.7mm x 9.0mm x 19.6mm high.

For each set of 6 MCMs (corresponds to power/communications circuit board), require 10 each 18 gauge wire. The ampacity of the 18-gauge wire is 3A. 3 each +5V, 3 each digital gnd, 1 each -5V, 1 each analog gnd. For 7 groups of 6 MCMs, we have 70 each 18 gauge wire. Assuming 2 mm O.D. of insulated wire + 2/3 packing factor, get a cross sectional area of 328mm^2 (18mm x 18mm). Associated with each connector are 5 each voltage regulators with a capacity of 3 amps each. The regulator outputs are protected by Raychem PolySwitch resettable fuses. In addition, need to current limit lines to the 160 contact connector to avoid using the connector as a fuse.

Typical Power Connector Pin Assignments
1. +5V digital
2. +5V digital return
3. +5V digital
4. +5V digital return
5. +5V analog
6. +5V analog return
7. +5V analog
8. +5V analog return
9. -5V
10. -5V return
11. (spare)
12. Power cable shield termination
13. Inner enclosure shield termination
14. Outer enclosure shield termination
(Note: The connector for motherboard power uses pins 1-8 only.)

B. Silicon Bias Pin Assignments

Maximum of 42 silicon detectors/quadrant => 42 bias + 42 bias returns. Low current requirement (130V Max), so use shielded 25 mil pitch cable and IDC connectors. These connectors are rated for 500Vrms at sea level. Require 2 connectors, 1 ea. 50 contact connector and 1 ea. 40 contact connector. These cables go to the power distribution box.

Silicon Bias Connector 1
50 contact header: 3M 81050-660X0X
50 contact mating socket connector: 3M 82050-6006
1. group 1, mcm 1, silicon bias 2. group 1, mcm 1, silicon bias return
3. group 1, mcm 2, silicon bias 4. group 1, mcm 2, silicon bias return
5. group 1, mcm 3, silicon bias 6. group 1, mcm 3, silicon bias return
7. group 1, mcm 4, silicon bias 8. group 1, mcm 4, silicon bias return
9. group 1, mcm 5, silicon bias 10. group 1, mcm 5, silicon bias return
11. group 1, mcm 6, silicon bias 12. group 1, mcm 6, silicon bias return
13. group 2, mcm 1, silicon bias 14. group 2, mcm 1, silicon bias return
15. group 2, mcm 2, silicon bias 16. group 2, mcm 2, silicon bias return
17. group 2, mcm 3, silicon bias 18. group 2, mcm 3, silicon bias return
19. group 2, mcm 4, silicon bias 20. group 2, mcm 4, silicon bias return
21. group 2, mcm 5, silicon bias 22. group 2, mcm 5, silicon bias return
23. group 2, mcm 6, silicon bias 24. group 2, mcm 6, silicon bias return
25. group 3, mcm 1, silicon bias 26. group 3, mcm 1, silicon bias return
27. group 3, mcm 2, silicon bias 28. group 3, mcm 2, silicon bias return
29. group 3, mcm 3, silicon bias 30. group 3, mcm 3, silicon bias return
31. group 3, mcm 4, silicon bias 32. group 3, mcm 4, silicon bias return
33. group 3, mcm 5, silicon bias 34. group 3, mcm 5, silicon bias return
35. group 3, mcm 6, silicon bias 36. group 3, mcm 6, silicon bias return
37. group 4, mcm 1, silicon bias 38. group 4, mcm 1, silicon bias return
39. group 4, mcm 2, silicon bias 40. group 4, mcm 2, silicon bias return
41. group 4, mcm 3, silicon bias 42. group 4, mcm 3, silicon bias return
43. group 4, mcm 4, silicon bias 44. group 4, mcm 4, silicon bias return
45. group 4, mcm 5, silicon bias 46. group 4, mcm 5, silicon bias return
47. group 4, mcm 6, silicon bias 48. group 4, mcm 6, silicon bias return
49. (spare) 50. (spare)

Silicon Bias Connector 2
40 contact header: 3M 81040-660X0X
40 contact mating socket connector: 3M 82040-6006
1. group 5, mcm 1, silicon bias 2. group 5, mcm 1, silicon bias return
3. group 5, mcm 2, silicon bias 4. group 5, mcm 2, silicon bias return
5. group 5, mcm 3, silicon bias 6. group 5, mcm 3, silicon bias return
7. group 5, mcm 4, silicon bias 8. group 5, mcm 4, silicon bias return
9. group 5, mcm 5, silicon bias 10. group 5, mcm 5, silicon bias return
11. group 5, mcm 6, silicon bias 12. group 5, mcm 6, silicon bias return
13. group 6, mcm 1, silicon bias 14. group 6, mcm 1, silicon bias return
15. group 6, mcm 2, silicon bias 16. group 6, mcm 2, silicon bias return
17. group 6, mcm 3, silicon bias 18. group 6, mcm 3, silicon bias return
19. group 6, mcm 4, silicon bias 20. group 6, mcm 4, silicon bias return
21. group 6, mcm 5, silicon bias 22. group 6, mcm 5, silicon bias return
23. group 6, mcm 6, silicon bias 24. group 6, mcm 6, silicon bias return
25. group 7, mcm 1, silicon bias 26. group 7, mcm 1, silicon bias return
27. group 7, mcm 2, silicon bias 28. group 7, mcm 2, silicon bias return
29. group 7, mcm 3, silicon bias 30. group 7, mcm 3, silicon bias return
31. group 7, mcm 4, silicon bias 32. group 7, mcm 4, silicon bias return
33. group 7, mcm 5, silicon bias 34. group 7, mcm 5, silicon bias return
35. group 7, mcm 6, silicon bias 36. group 7, mcm 6, silicon bias return
37. (spare) 38. (spare)
39. (spare) 40. (spare)

C. Analog Sum Outputs Connector Pin Assignments

24 each single ended signals. Assume shielded 25-mil pitch cable and a 50 contact connector.
50 contact header: 3M 81050-660X0X
50 contact mating socket connector: 3M 82050-6006
This cable goes to the trigger interface
01. group 1, mcm1, discriminator sum 02. group 1, mcm1, discriminator sum return
03. group 1, mcm2, discriminator sum 04. group 1, mcm2, discriminator sum return
05. group 1, mcm3, discriminator sum 06. group 1, mcm3, discriminator sum return
07. group 1, mcm4, discriminator sum 08. group 1, mcm4, discriminator sum return
09. group 1, mcm5, discriminator sum 10. group 1, mcm5, discriminator sum return
11. group 1, mcm6, discriminator sum 12. group 1, mcm6, discriminator sum return
13. group 2, mcm1, discriminator sum 14. group 2, mcm1, discriminator sum return
15. group 2, mcm2, discriminator sum 16. group 2, mcm2, discriminator sum return
17. group 2, mcm3, discriminator sum 18. group 2, mcm3, discriminator sum return
19. group 2, mcm4, discriminator sum 20. group 2, mcm4, discriminator sum return
21. group 2, mcm5, discriminator sum 22. group 2, mcm5, discriminator sum return
23. group 2, mcm6, discriminator sum 24. group 2, mcm6, discriminator sum return
25. group 3, mcm1, discriminator sum 26. group 3, mcm1, discriminator sum return
27. group 3, mcm2, discriminator sum 28. group 3, mcm2, discriminator sum return
29. group 3, mcm3, discriminator sum 30. group 3, mcm3, discriminator sum return
31. group 3, mcm4, discriminator sum 32. group 3, mcm4, discriminator sum return
33. group 3, mcm5, discriminator sum 34. group 3, mcm5, discriminator sum return
35. group 3, mcm6, discriminator sum 36. group 3, mcm6, discriminator sum return
37. group 7, mcm1, discriminator sum 38. group 7, mcm1, discriminator sum return
39. group 7, mcm2, discriminator sum 40. group 7, mcm2, discriminator sum return
41. group 7, mcm3, discriminator sum 42. group 7, mcm3, discriminator sum return
43. group 7, mcm4, discriminator sum 44. group 7, mcm4, discriminator sum return
45. group 7, mcm5, discriminator sum 46. group 7, mcm5, discriminator sum return
47. group 7, mcm6, discriminator sum 48. group 7, mcm6, discriminator sum return
49. (spare)--------------------------- 50. (spare)

D. Timing Signal Connectors Pin Assignments

7 each 20 contact connectors
20 contact header: 3M 81020-660X0X
20 contact mating socket connector: 3M 82020-6006
1. MB0 ;mode bit 0 2. digital gnd
3. MB1 ;mode bit 1 4. digital gnd
5. MB2 ;mode bit 2 6. digital gnd
7. MB3 ;mode bit 3 8. digital gnd
9. MB4 ;mode bit 4 10. digital gnd
11. MB5 ;mode bit 5 12. digital gnd
13. level 1 accept 14. digital gnd
15. 9.5 MHz beam clock 16. digital gnd
17. 38 Mhz (4 X beam clock) 18. digital gnd
19. digital gnd 20. digital gnd
Note:
-Assume timing signals are single ended logic consistent with 50-ohm loads (e.g. Motorola FACT CMOS). Assume 25 mil pitch pleated foil shielded cable (3M 90101/20) with IDC connectors (3M 82020-600X .050"x .100" tripolarized wiremount mini socket) and mating headers (3M 81020-6X0C0X .050" x .100" tripolarized latch/ejector header).

E. Serial/Control Signal Connectors Pin Assignments

7 each 26 contact connectors
26 contact header: 3M 81026-660X0X
26 contact mating socket connector: 3M 82026-6006
1. digital gnd 2. digital gnd
3. mcm 1 serial enable 4. mcm 2 serial enable
5. mcm3 serial enable 6. mcm 4 serial enable
7. mcm 5 serial enable 8. mcm 6 serial enable
9. digital gnd 10. digital gnd
11. serial clock 12. serial data in
13. digital gnd 14. digital gnd
15. mcm 1 serial data out 16. mcm 2 serial data out
17. mcm3 serial data out 18. mcm 4 serial data out
19. mcm 5 serial data out 20. mcm 6 serial data out
21. serial latch 22. read back enable
23. digital gnd 24. digital gnd
25. xilinx program 26. mcm reset
Note: The serial data-out signal requires a driver on the Power/Comm (42 signals).

F. LVDS Outputs Pin Assignments

7 each 36 contact connectors
36 contact header: 3M 81036-660X0X
36 contact mating socket connector: 3M 82036-6006
01. MCM1 LVDS_DATA_OUT_CLK_A 02. MCM1 LVDS_DATA_OUT_CLK_B
03. MCM1 LVDS_DATA_OUT_1A 04. MCM1 LVDS_DATA_OUT_1B
05. MCM1 LVDS_DATA_OUT_2A 06. MCM1 LVDS_DATA_OUT_2B
07. MCM2 LVDS_DATA_OUT_CLK_A 08. MCM2 LVDS_DATA_OUT_CLK_B
09. MCM2 LVDS_DATA_OUT_1A 10. MCM2 LVDS_DATA_OUT_CLK_B
11. MCM2 LVDS_DATA_OUT_2A 12. MCM2 LVDS_DATA_OUT_2B
13. MCM3 LVDS_DATA_OUT_CLK_A 14. MCM3 LVDS_DATA_OUT_CLK_B
15. MCM3 LVDS_DATA_OUT_1A 16. MCM3 LVDS_DATA_OUT_1B
17. MCM3 LVDS_DATA_OUT_2A 18. MCM3 LVDS_DATA_OUT_2B
19. MCM4 LVDS_DATA_OUT_CLK_A 20. MCM4 VDS_DATA_OUT_CLK_B
21. MCM4LVDS_DATA_OUT_1A 22. MCM4 LVDS_DATA_OUT_1B
23. MCM4 LVDS_DATA_OUT_2A 24. MCM4 LVDS_DATA_OUT_2B
25. MCM5 LVDS_DATA_OUT_CLK_A 26. MCM5 LVDS_DATA_OUT_CLK_B
27. MCM5 LVDS_DATA_OUT_1A 28. MCM5 LVDS_DATA_OUT_1B
29. MCM5 LVDS_DATA_OUT_2A 30. MCM5 LVDS_DATA_OUT_2B
31. MCM6 LVDS_DATA_OUT_CLK_A 32. MCM6 LVDS_DATA_OUT_CLK_B
33. MCM6 LVDS_DATA_OUT_1A 34. MCM6 LVDS_DATA_OUT_1B
35. MCM6 LVDS_DATA_OUT_2A 36. MCM6 LVDS_DATA_OUT_2B

G. Monitoring Signals Pin Assignments

LDO output voltages (35) and MCM temperatures (42 fully populated, 34 nominal -Analog Devices ) monitored on motherboard using 10 ea MAXIM 8-channel serial 12 bit ADCs. Serial control and readout from Power Distribution Box through 40 contact 3M header (81040-6X0X0X). Use 3M 90101 series 25- mil pitch pleated foil shielded cable.

Each MCM has two spy lines (preamp output and AMU output for any 1 of 256 channels) for a total of 42 spy line pairs assuming full population. Analog Devices ADG406 16 channel analog multiplexer (6 required) appears to be a candidate component. Some glue logic will be required to interface to a serial link.

40 Contact Monitor Connector Signals
1. digital gnd 2. digital gnd
3. monitor serial clock 4. digital gnd
5. monitor serial data in 6. digital gnd
7. monitor serial data out 8. ADC_A0
9. monitor SSTRB 10. ADC_A1
11. digital gnd 12. ADC_A2
13. digital gnd 14. ADC_A3
15. (spare): 1k term. to Dig.Gnd 16. (spare): 1k term. to Dig.Gnd
17. digital gnd 18. digital gnd
19. spy_A0 20. spy_A1
21. spy_A2 22. spy_A3
23. spy_A4 24. spy_A5
25. digital gnd 26. digital gnd
27. digital gnd 28. digital gnd
29. (spare): 1k term. to Dig.Gnd 30. (spare): 1k term. to Dig.Gnd
31. analog gnd 32. analog gnd
33. preamp output spy channel (AMU input) 34. analog gnd
35. analog gnd 36. analog gnd
37. amu output spy channel 38. analog gnd
39. analog gnd 40. analog gnd