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PIN No.
Symbol
Pin Name
37
P3-0/SCK1
/RX1
/Serial clock input/
(BRK1)
output 1/UART input 1
38
P3-1/SDIO1
/Serial data input/
/TX1
output 1/UART output 1
(BRK2)
39
P3-2/SI1
/Serial data input 1
(BRK3)
40
P3-3/PCTin
/Pulse counter input
(BRK4)
Function and Operation
4-bit CMOS I/O Port, allowing input and
output to be programmed in 1-bit units.
When the I/O port is set as input, the
pull-up/pull-down state can be
programmed in 1-bit units.
If set as the input state of an I/O port and
a backup release enable state, the backup
state can be released by changing input
state in the clock stop and the wait modes.
I/O port 3
Pins P3-0 to P3-2 are used as input/output
pins of a serial interface circuit.
The serial interface circuit corresponds to
2-wired, 3-wired and UART types. Serial
clock edge, serial clock input/output and
clock frequency are selectable, facilitating
the control of various LSIs and
communication between controllers.
When interruption of a serial interface
circuit is permitted, interruption occurs and
a program is jumped to the 3rd address
after the serial interface operation is
completed.
The P3-3 pin is used as 8-bit pulse
counter input PCTRin. Since it is possible
to select either or both of the rising edge
and falling edge of the input pin, as well as
count-up or count-down, the pin can be
used as an input to a tape count.
8
TC9349AFG
Remarks
V
DD
R
IN1
V
DD
V
DD
Input instruction
Release enables
2006-02-24
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