Compaq Evo D500 Technical Reference Manual page 97

4.8.3.1 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 Events
16 Fan sense
17 LED test
20 Pri. IDE 80-pin Cable Detect
21 Sec. IDE 80-pin Cable Detect
22 --
23 Backplane board ID 0
24 BIOS fail for AOL
25 Backplane board ID 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 A
37 Diskette Select A
NOTE:
[1] Not implemented on Configurable Minitower models.
Table 4-20.
LPC47B357 GPIO Port Utilization
Direction GPIO
I 42
I 43
NC 44
I 45
NC 46
NC 60
I 61
O 62
I 63
I 64
NC 65
I 66
I 67
I 70
I 71
NC 72
O 73
O 74
I 75
I 76
O 85
O 86
O --
O --
Compaq Deskpro and Evo Personal Computers
Featuring Intel Celeron and Pentium III Processors
Fifth Edition - March 2002
Technical Reference Guide
Function
ICH2 SCI
--
Hood Lock [1]
Hood Unlock [1]
ICH2 SMI-
PCI Slot Reset
AGP Slot Reset
PWR Button In
SLP S3
SLP S5
CPU Changed
PWR Button Out
PS On
Remote Off
Backplane Detect 1
Backplane Detect 2
--
NIC PHY Disable
--
--
Pwr SEL
S3 3.3 VDC On
--
--
Direction
O
NC
I
I
O
O
O
I
I
I
I
O
O
I
I
!
NC
O
NC
NC
O
O
--
--
4-41