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1
1-11
OVERVIEW
32176 Group User’s Manual (Rev.1.01)
1.3 Pin Functions
Table 1.3.1 Description of Pin Functions (3/4)
Type
Pin Name
Signal Name
Input/Output Description
Serial I/O
SCLKI0/
UART transmit/receive
Input/output
When channel 0 is in UART mode:
SCLKO0
clock output or CSIO
This pin outputs a clock derived from BRG output by
transmit/receive clock
dividing it by 2.
input/output
When channel 0 is in CSIO mode:
This pin accepts as input a transmit/receive clock when
external clock is selected or outputs a transmit/receive
clock when internal clock is selected.
SCLKI1/
UART transmit/receive
Input/output
When channel 1 is in UART mode:
SCLKO1
clock output or CSIO
This pin outputs a clock derived from BRG output by
transmit/receive clock
dividing it by 2.
input/output
When channel 1 is in CSIO mode:
This pin accepts as input a transmit/receive clock when
external clock is selected or outputs a transmit/receive
clock when internal clock is selected.
TXD0
Transmit data
Output
Transmit data output pin for serial I/O channel 0.
RXD0
Received data
Input
Received data input pin for serial I/O channel 0.
TXD1
Transmit data
Output
Transmit data output pin for serial I/O channel 1.
RXD1
Received data
Input
Received data input pin for serial I/O channel 1.
TXD2
Transmit data
Output
Transmit data output pin for serial I/O channel 2.
RXD2
Received data
Input
Received data input pin for serial I/O channel 2.
TXD3
Transmit data
Output
Transmit data output pin for serial I/O channel 3.
RXD3
Received data
Input
Received data input pin for serial I/O channel 3.
Real-time
RTDTXD
Transmit data
Output
Serial data output pin for the real-time debugger.
debugger
RTDRXD
Received data
Input
Serial data input pin for the real-time debugger.
(RTD)
RTDCLK
Clock input
Input
Serial data transmit/receive clock input pin for the real-time
debugger.
RTDACK
Acknowledge
Output
A low-level pulse is output from this pin synchronously with
the start clock for the real-time debugger’s serial data output
word. The low-level pulse width indicates the type of command/
data received by the real-time debugger.
CAN
CTX0, CTX1 Data output
Output
This pin outputs data from the CAN module.
CRX0, CRX1 Data input
Input
This pin accepts as input the data for the CAN module.
JTAG
JTMS
Test mode
Input
Test mode select input to control the state transition of the
test circuit.
JTCK
Clock
Input
Clock input for the debug module and test circuit.
JTRST
Test reset
Input
Test reset input to initialize the test circuit asynchronously
with device operation.
JTDI
Serial input
Input
This pin accepts as input the test instruction code or test data
that is serially received.
JTDO
Serial output
Output
This pin outputs the test instruction code or test data serially.