Intermec 073300-001 Benutzerhandbuch
Chapter 4 — Theory of Operation
PXA255 GPIO Signal Descriptions (continued)
PXA255 GPIO
Function
Signal Description
Usage
GP2
BT_WAKEUP*
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.
when you select system wakeup from Bluetooth wakeup
event.
PXA255 input
↓
= interrupt
GP3
HOST_DETECT
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.
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.
PXA255 input
↑ = interrupt
↑ = interrupt
GP4
PME*/CF_STSCHG*
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.
This is a maskable resume source (See Note 1). Enabled
when you select system wakeup from a Mini PCI radio
power management event.
PXA255 input
↓
= interrupt
GP5
SDMMC_CD
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.
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.
PXA255 input
0 = no card;
1 = card installed
0 = no card;
1 = card installed
GP7
SDMMC_IRQ*
SD slot interrupt.
PXA255 input
↓
= interrupt
GP8
SOCKET0_IRQ*
CF slot interrupt (not used on CK30).
PXA255 input
↓
= interrupt
GP9
SOCKET0_CD*
CF slot card detect (not used on CK30).
PXA255 input
0 = card installed
1 = no card
0 = card installed
1 = no card
GP10
BATT_FAULT_IRQ*
Low-batt or batt removed interrupt. Software should start an
orderly Suspend immediately.
This is not a resume source!
orderly Suspend immediately.
This is not a resume source!
PXA255 input
↓
= interrupt
GP11
FLASH_PROT*
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.
“protected” state, and set high only when an intentional flash
erase or write cycle must take place.
PXA255 output
0 = disable writes
1 = enable writes
0 = disable writes
1 = enable writes
GP12
SCAN_IRQ* / DONE
Scanner interface interrupt. During FPGA download, this
doubles as the FPGA download done indication.
This is not a resume source!
doubles as the FPGA download done indication.
This is not a resume source!
PXA255 input
↓
= interrupt,
↑ = download
done.
done.
Can wake processor from
Sleep
st
ate.
GP15
CF_PWR_EN* /
PCI_PWR_EN*
PCI_PWR_EN*
Power enable for CF slot or Mini PCI slot
PXA255 output
0 = slot power on
1 = slot power off
0 = slot power on
1 = slot power off
GP21
FPGA_PGM*
Clear FPGA in preparation for download
Pulse low to start
program process
program process
GP22
FPGA_PWR_EN*
Power enable for scanner I/F and Mini PCI FPGA
0 = FPGA power
on
1 = FPGA power
off
on
1 = FPGA power
off
GP27
TOUCH_IRQ*
Pen-down interrupt from touch panel (not used on CK30)
↓ = interrupt
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.
change), and must be re-enabled by software when appropriate.
44
CK30 Handheld Computer Service Manual