User Guide • SC4-CONCERTO • CompactPCI
®
Serial CPU Board
P-EXP
P-EXP • Expansion Board Interface (LPC/HD-Audio/UART)
1.27mm Socket 2 x 20 (276.53.040.01)
pin orientation shows
CPU carrier board top
view
GND
1
2
+3.3VS
1)
CLK_24MHZ
(CLK_33MHz)
3
4
PLTRST#
LPC_AD0
5
6
LPC_AD1
LPC_AD2
7
8
LPC_AD3
LPC_FRAME#
9
10
NC
(LPC_DRQ#)
GND
11
12
+3.3VS
1)
SERIRQ
13
14
PME#
SMI#
15
16
CLK_14MHZ
2_UART_TXD
(FWH_ID0)
17
18
2_UART_RXD
(FWH_INIT#)
RCIN#
4)
(KBD_RST#)
19
20
2_UART_RTS#
(A20GATE)
GND
21
22
+5VS
1)
1_UART_TXD
(2_USB2_N)
23
24
1_UART_RTS#
(1_USB2_N)
1_UART_RXD
(2_USB2_P)
25
26
1_UART_CTS#
(1_USB2_P)
2_UART_CTS#
(USB2_OC#)
27
28
XDP_RESET#
5)
I2C_SCL
3)
29
30
I2C_SDA
3)
GND
31
32
+5VS
1)
HDA_SDOUT
33
34
HDA_SDIN0
HDA_RST#
35
36
HDA_SYNC
HDA_BITCLK
37
38
HDA_SDIN1
SPEAKER
39
40
+12VPS
2)
1)
Power rail switched on in S0 state only
2)
Power rail switched on in S0-S4 state
3)
Connected to CM238 PCH I
2
C Bus Controller 0
4)
Connected to CM238 PCH pin RCIN#/GPP_A0
5)
Connected to debug port reset logic in order to force hardware reset
6)
Signals are 3.3V tolerant only
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