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参数资料
型号： R5F21294KXXXSP
厂商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 16-BIT CMOS MCU
中文描述： 单片16位CMOS微控制器
文件页数： 8/71页
文件大小： 552K
代理商： R5F21294KXXXSP
R8C/28 Group, R8C/29 Group
1. Overview
Rev.1.10
REJ03B0169-0110
May 17, 2007
Page 8 of 67
1.6
Pin Functions
Table 1.5 lists Pin Functions.
I: Input
O: Output
I/O: Input and output
Table 1.5
Pin Functions
Type
Symbol
I/O Type
I
Description
Power supply input
VCC, VSS
Apply 2.2 V to 5.5 V (J, K version are 2.7 V to 5.5 V) to the
VCC pin. Apply 0 V to the VSS pin.
Power supply for the A/D converter.
Connect a capacitor between AVCC and AVSS.
Input “L” on this pin resets the MCU.
Connect this pin to VCC via a resistor.
These pins are provided for XIN clock generation circuit I/O.
Connect a ceramic resonator or a crystal oscillator between
the XIN and XOUT pins. To use an external clock, input it to
the XIN pin and leave the XOUT pin open.
Analog power
supply input
Reset input
MODE
XIN clock input
AVCC, AVSS
I
RESET
MODE
XIN
I
I
I
XIN clock output
XOUT
O
XCIN clock input
(N, D version)
XCIN clock output
(N, D version)
XCIN
I
These pins are provided for XCIN clock generation circuit I/O.
Connect a crystal oscillator between the XCIN and XCOUT
pins. To use an external clock, input it to the XCIN pin and
leave the XCOUT pin open.
XCOUT
O
INT interrupt input
Key input interrupt
INT0, INT1, INT3
I
I
INT interrupt input pins
Key input interrupt input pins
KI0 to KI3
TRAO
TRAIO
TRBO
TRCCLK
TRCTRG
TRCIOA, TRCIOB,
TRCIOC, TRCIOD
CLK0
RXD0, RXD1
TXD0, TXD1
SCL
Timer RA
O
I/O
O
I
I
I/O
Timer RA output pin
Timer RA I/O pin
Timer RB output pin
External clock input pin
External trigger input pin
Sharing output-compare output / input-capture input / PWM /
PWM2 output pins
Clock I/O pin
Receive data input pin
Transmit data output pin
Clock I/O pin
Timer RB
Timer RC
Serial interface
I/O
I
O
I/O
I
2
C bus interface
SDA
SSI
I/O
I/O
I/O
Data I/O pin
Data I/O pin
Chip-select signal I/O pin
Clock synchronous
serial I/O with chip
select
SCS
SSCK
SSO
VREF
I/O
I/O
I
Clock I/O pin
Data I/O pin
Reference voltage input pin to A/D converter
Reference voltage
input
A/D converter
I/O port
AN8 to AN11
P1_0 to P1_7,
P3_3 to P3_5, P3_7,
P4_5
I
Analog input pins to A/D converter
CMOS I/O ports. Each port has an I/O select direction
register, allowing each pin in the port to be directed for input
or output individually.
Any port set to input can be set to use a pull-up resistor or not
by a program.
P1_0 to P1_7 also function as LED drive ports. (N, D version)
Input-only ports
I/O
Input port
P4_2, P4_6, P4_7
I
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