Rev. 2.00, 09/03, page 20 of 690
Classification
Symbol
I/O
Name
Function
DREQ0,
DREQ1
I
DMA-transfer
request
Input pin for external requests for
DMA transfer.
DACK0,
DACK1
O
DMA-transfer
strobe
Output strobe to external I/O, in
response to external requests for
DMA transfer.
Direct memory
access controller
(DMAC)
TEND0
O
DMA-transfer
end
Transfer end output for DMAC
channel 0.
Timer unit (TMU) TCLK
I
Clock input
External clock input pin/input
capture control input pin.
16-bit timer pulse
unit (TPU)
TO3 to TO0
O
Timer output
Output compare/PWM output pin.
TxD0, TxD2
O
Transmit data
Transmit data pin.
RxD0, RxD2
I
Receive data
Receive data pin.
SCK0, SCK2
I/O
Serial clock
Clock input/output pin.
RTS0
,
RTS2
O
Transmit
request
Modem control pin.
Serial
communication
interface with
FIFO
(SCIF0, SCIF2)
CTS0
,
CTS2
I
Transmit enable Modem control pin.
IrTX
O
IrDA TX port
IrDA transmit data output.
IrDA
IrRX
I
IrDA RX port
IrDA receive data input.
EXTAL2
I
RTC clock
RTC crystal oscillator pin. (32.768
kHz)
XTAL2
O
RTC clock
RTC crystal oscillator pin. (32.768
kHz)
Vcc-RTC
RTC power
supply
Power supply pin for the RTC.
Realtime clock
(RTC)
Vss-RTC
RTC ground
Ground pin for the RTC.
AN3 to AN0
I
Analog input pin Analog input pin.
AVcc
A/D analog
power supply
Power supply for the A/D
converter. When the A/D converter
is not in use, connect this pin to the
port power supply (VccQ).
A/D converter
(ADC)
AVss
A/D analog
ground
Ground pin for the A/D converter.
Connect this pin to the system
power supply (Vss).
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