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Intel® PXA255 Processor Developer’s Manual 2-13
System Architecture
BTCTS/
GPIO[44]
ICOCZ Bluetooth UART Clear-to-Send. (input) Hi-Z - Note [1] Note [3]
BTRTS/
GPIO[45]
ICOCZ Bluetooth UART Data-Terminal-Ready. (output) Hi-Z - Note [1] Note [3]
Standard UART and ICP Pins
IRRXD/
GPIO[46]
ICOCZ
IrDA receive signal. (input) Receive pin for the FIR
function.
Standard UART receive. (input)
Hi-Z - Note [1] Note [3]
IRTXD/
GPIO[47]
ICOCZ
IrDA transmit signal. (output) Transmit pin for the
Standard UART, SIR and FIR functions.
Standard UART transmit. (output)
Hi-Z - Note [1] Note [3]
HWUART Pins
HWTXD/
GPIO[48]
ICOCZ Hardware UART Transmit Data.
Pulled High
Note [1]
Note [3]
HWRXD/
GPIO[49]
ICOCZ Hardware UART Receive Data.
Pulled High
Note [1]
Note [3]
HWCTS/
GPIO[50]
ICOCZ Hardware UART Clear-To-Send.
Pulled High
Note [1]
Note [3]
HWRTS/
GPIO[51]
ICOCZ Hardware UART Request-to-Send.
Pulled High
Note [1]
Note [3]
MMC Controller Pins
MMCMD ICOCZ Multimedia Card Command. (bidirectional) Hi-Z Hi-Z
MMDAT ICOCZ Multimedia Card Data. (bidirectional) Hi-Z Hi-Z
nPCE[2]/
GPIO[53]
ICOCZ
PCMCIA card enable 2. (outputs) Selects a PCMCIA
card. Bit one enables the high byte lane and bit zero
enables the low byte lane.
MMC clock. (output) Clock signal for the MMC
Controller.
Hi-Z - Note [1] Note [5]
L_DD[9]/
GPIO[67]
ICOCZ
LCD display data. (output) Transfers pixel information
from the LCD Controller to the external LCD panel.
MMC chip select 0. (output) Chip select 0 for the MMC
Controller.
Hi-Z - Note [1] Note [3]
L_DD[10]/
GPIO[68]
ICOCZ
LCD display data. (output) Transfers pixel information
from the LCD Controller to the external LCD panel.
MMC chip select 1. (output) Chip select 1 for the MMC
Controller.
Hi-Z - Note [1] Note [3]
L_DD[11]/
GPIO[69]
ICOCZ
LCD display data. (output) Transfers pixel information
from the LCD Controller to the external LCD panel.
MMC clock. (output) Clock for the MMC Controller.
Hi-Z - Note [1] Note [3]
FFRXD/
GPIO[34]
ICOCZ
Full Function UART Receive. (input)
MMC chip select 0. (output) Chip select 0 for the MMC
Controller.
Hi-Z - Note [1] Note [3]
FFTXD/
GPIO[39]
ICOCZ
Full Function UART Transmit. (output)
MMC chip select 1. (output) Chip select 1 for the MMC
Controller.
Hi-Z - Note [1] Note [3]
Table 2-6. Pin & Signal Descriptions for the PXA255 Processor (Sheet 5 of 9)
Pin Name Type Signal Descriptions Reset State Sleep State