User Guide • SC4-CONCERTO • CompactPCI
®
Serial CPU Board
GPIO Usage
GPIO Usage CM238 PCH
GPIO Usage CM238 PCH
GPIO
USAGE
DIR
Function
Description
Group A (GPP_A)
A0
Native
IN
RCIN#
Keyboard Reset, to P-EXP Pin 13
A1-A4
Native
I/O
LPC_AD[0-3]
LPC Address/Data Lines
A5
Native
OUT
LPC_FRAME#
LPC Frame
A6
Native
IN
SERIRQ
Serialized IRQ
A7
Native
IN
PIRQA#
Not used on SC4 (pulled via resistor to +3.3V)
A8
Native
IN
CLKRUN#
Not used on SC4 (pulled via resistor to +3.3V)
A9
Native
OUT
CLKOUT_LPC0
24MHz LPC Clock, to P-EXP Pin 3
A10
Native
OUT
CLKOUT_LPC1
24MHz LPC Clock, to TPM
A11
Native
IN
PME#
Power Management Event, to P-EXP Pin 14
A12-
A13
GPIO
IN
N/A
Not connected on SC4
A14
Native
OUT
N/A
Not connected on SC4
A15-
A16
GPIO
IN
N/A
Not connected on SC4
A17-
A19
GPIO
IN
HW_REV[0:2]
PCB Revision Code HW_REV[2:0]
GPIO[19:17]
000
001
010
...
110
111
Revision 0
1
2
6
7
A20
GPIO
OUT
SE_SYS_WP
TPM2.0 Physical Present Pin
A21-
A23
GPIO
IN
N/A
Not connected on SC4
Group B (GPP_B)
B0
GPIO
OUT
ENABLE_NC2
Enable Ethernet Controller NC2
B1-
B5
GPIO
IN
N/A
Not connected on SC4
B6
Native
IN
CLKREQ1#
CompactPCI
®
Clock Request Slot 1 (P5 C5: 1_PE_CLKE#)
B7
Native
IN
CLKREQ2#
CompactPCI
®
Clock Request Slot 2 (P5 F5: 2_PE_CLKE#)
B8
Native
IN
CLKREQ3#
CompactPCI
®
Clock Request Slot 3 (P5 I5: 3_PE_CLKE#)
B9
Native
IN
CLKREQ4#
CompactPCI
®
Clock Request Slot 4 (P5 L5: 4_PE_CLKE#)
B10
Native
IN
CLKREQ5#
CompactPCI
®
Clock Request Slot 5 (P5 A6: 5_PE_CLKE#)
B11-
B12
GPIO
IN
N/A
Not connected on SC4
B13
Native
OUT
PLTRST#
Platform Reset
B14
Native
OUT
SPEAKER
Speaker, to P-EXP Pin 39
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