rtd cpuModule CMA22M Series, User Manual

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42 CMA22M cpuModule BDM-610000069 Rev A
Express Platform Bus (CN1) (Top-Type 2)
Connector CN1 carries the signals of the Express Platform bus. The signals on the first bank match definitions
found in the PCI/104-Express & PCIe/104 Specification Version 1.1 from the PC/104 Embedded Consortium.
The signals on the second and third bank are used for SATA hard drive carrier expansion. Table 29 lists the
pinouts of the PC/104-Express bus connector.
WARNING Not all PCIe cards are compatible with the Express Platform (Type 2) connector. Be sure that
all of the boards attached to this bus are compatible before powering the system.
Table 29 Express Platform Bus Signal Assignments (Top View)
1
Pin Signal Signal Pin
1 USB_OC#
+5 V
o
lt
s
PE_RST# 2
3 +3.3V +3.3V 4
5 USB_1p USB_0p 6
7 USB_1n USB_0n 8
9 GND GND 10
11 PEx1_1Tp PEx1_0Tp 12
13 PEx1_1Tn PEx1_0Tn 14
15 GND GND 16
17 PEx1_2Tp PEx1_3Tp 18
19 PEx1_2Tn PEx1_3Tn 20
21 GND GND 22
23 PEx1_1Rp PEx1_0Rp 24
25 PEx1_1Rn PEx1_0Rn 26
27 GND GND 28
29 PEx1_2Rp PEx1_3Rp 30
31 PEx1_2Rn PEx1_3Rn 32
33 GND GND 34
35 PEx1_1Clkp PEx1_0Clkp 36
37 PEx1_1Clkn PEx1_0Clkn 38
39 +5V_Always +5V_Always 40
41 PEx1_2Clkp PEx1_3Clkp 42
43 PEx1_2Clkn PEx1_3Clkn 44
45 CPU_DIR(GND) PWRGOOD 46
47 SMB_DATA Reserved 48
49 SMB_CLK Reserved 50
51 n.c. PSON# 52