Lpc47B357 Gpio R - HP Deskpro EX Technical Reference Manual

4.9.3.1 LPC47B357 GPIO Utilization
The LPC47B357 I/O Controller provides 62 general-purpose pins that can be individually
configured for specific purposes. These pins are configured through the Runtime registers (logical
device 0Ah) during the system's configuration phase of the boot sequence by the BIOS.
Table 4-20 lists the GPIO registers for the LPC47B357. Note that not all ports are listed as this
table defines only the custom implementation of GPIO ports. Refer to SMC documentation for
standard usage of unlisted GPIO ports.
Table 4-20. LPC47B357 GPIO Register Utilization
GPIO Function
10 Board rev 1
11 Board rev 0
12 --
13 PME-
14 WOL
15 System ID 4 [1]
16 Processor Fan sense
17 --
20 Pri. IDE 80-pin Cable Detect
21 Sec. IDE 80-pin Cable Detect
22 --
23 System ID 2 [1]
24 BIOS fail for AOL
25 System ID 3 [1]
26 Processor Present
27 --
30 PS LED Color Grn
31 PS LED Blink
32 Thermal Trip
33 2 MB Media ID
34 FWH Write Protect
35 FWH Reset
36 Diskette Motor B
37 Diskette Select B
NOTE:
NC = Not connected (not used).
[1] System ID (ID4..0) value for these systems = 00110 for desktops, = 00111 for minitowers.
Table 4-20.
LPC47B357 GPIO Port Utilization
Direction GPIO
I 42
I 43
NC 44
I 45
NC 46
I 60
I 61
NC 62
I 63
I 64
NC 65
I 66
O 67
I 70
I 71
NC 72
O 73
O 74
I 75
I 76
O 85
O 86
O --
O --
Compaq Deskpro EX Series of Personal Computers
First Edition - August 2000
Technical Reference Guide
Function
ICH SCI
--
Hood Lock
Hood Unlock
ICH SMI-
PCI Slot Reset
AGP Slot Reset
PWR Button In
SLP S3
SLP S5
CPU Changed/Removed
PWR Button Out
PS On
Remote Off
System ID 0 [1]
System ID 1 [1]
--
Chassis Fan Sense
--
--
Pwr SEL
S3 3.3 VDC On
--
--
Direction
O
NC
NC
NC
O
O
O
I
I
I
O
O
O
I
I
I
NC
I
NC
NC
O
O
--
--
4-41