Intermec CK30 Service Manual page 54

Chapter 4 — Theory of Operation
PXA255 GPIO Signal Descriptions (continued)
PXA255 GPIO Function
GP2 BT_WAKEUP*
GP3 HOST_DETECT
GP4 PME*/CF_STSCHG*
GP5 SDMMC_CD
GP7 SDMMC_IRQ*
GP8 SOCKET0_IRQ*
GP9 SOCKET0_CD*
GP10 BATT_FAULT_IRQ*
GP11 FLASH_PROT*
GP12 SCAN_IRQ* / DONE
GP15 CF_PWR_EN* /
PCI_PWR_EN*
GP21 FPGA_PGM*
GP22 FPGA_PWR_EN*
GP27 TOUCH_IRQ*
Note 1: Maskable resume sources: These resume events are automatically disabled by a low-battery event (like a battery
change), and must be re-enabled by software when appropriate.
44
Signal Description
System resume interrupt from Bluetooth module.
This is a maskable resume source (See Note 1). Enabled
when you select system wakeup from Bluetooth wakeup
event.
System resume interrupt from USB or dock serial interface.
Although this pin can be configured as a system wakeup
interrupt, it is duplicated on GPIO1 so that it will still
function even after a low-battery event (like a battery
change). It is not necessary to use this bit as anything other
than a run-time host detect interrupt.
System resume interrupt from Mini PCI or CF radio.
This is a maskable resume source (See Note 1). Enabled
when you select system wakeup from a Mini PCI radio
power management event.
SD slot card detect.
This is a maskable resume source (See Note 1). It can be
enabled to wake the system when an SD card is plugged in.
This is not a CK30 requirement, and is not supported.
SD slot interrupt.
CF slot interrupt (not used on CK30).
CF slot card detect (not used on CK30).
Low-batt or batt removed interrupt. Software should start an
orderly Suspend immediately.
This is not a resume source!
System flash write protect. This should be left in the
"protected" state, and set high only when an intentional flash
erase or write cycle must take place.
Scanner interface interrupt. During FPGA download, this
doubles as the FPGA download done indication.
This is not a resume source!
Power enable for CF slot or Mini PCI slot
Clear FPGA in preparation for download
Power enable for scanner I/F and Mini PCI FPGA
Pen-down interrupt from touch panel (not used on CK30)
CK30 Handheld Computer Service Manual
Usage
PXA255 input
↓
= interrupt
PXA255 input
↑ = interrupt
PXA255 input
↓
= interrupt
PXA255 input
0 = no card;
1 = card installed
PXA255 input
↓
= interrupt
PXA255 input
↓
= interrupt
PXA255 input
0 = card installed
1 = no card
PXA255 input
↓
= interrupt
PXA255 output
0 = disable writes
1 = enable writes
PXA255 input
↓
= interrupt,
↑ = download
done.
PXA255 output
0 = slot power on
1 = slot power off
Pulse low to start
program process
0 = FPGA power
on
1 = FPGA power
off
↓ = interrupt