参数资料
型号: R5F21274SNFP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32
封装: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件页数: 4/75页
文件大小: 622K
代理商: R5F21274SNFP
R8C/26 Group, R8C/27 Group
1. Overview
Rev.2.10
Sep 26, 2008
Page 10 of 69
REJ03B0168-0210
1.6
Pin Functions
I: Input
O: Output
I/O: Input and output
Table 1.5
Pin Functions
Type
Symbol
I/O Type
Description
Power supply input VCC, VSS
I
Apply 2.2 to 5.5 V (J, K version are 2.7 to 5.5 V) to the VCC
pin. Apply 0 V to the VSS pin.
Analog power
supply input
AVCC, AVSS
I
Power supply for the A/D converter.
Connect a capacitor between AVCC and AVSS.
Reset input
RESET
I
Input “L” on this pin resets the MCU.
MODE
I
Connect this pin to VCC via a resistor.
XIN clock input
XIN
I
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.
XIN clock output
XOUT
O
XCIN clock input
(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.
XCIN clock output
(N, D version)
XCOUT
O
INT interrupt input
INT0, INT1, INT3
IINT interrupt input pins
Key input interrupt
KI0 to KI3
I
Key input interrupt input pins
Timer RA
TRAO
O
Timer RA output pin
TRAIO
I/O
Timer RA I/O pin
Timer RB
TRBO
O
Timer RB output pin
Timer RC
TRCCLK
I
External clock input pin
TRCTRG
I
External trigger input pin
TRCIOA, TRCIOB,
TRCIOC, TRCIOD
I/O
Sharing output-compare output / input-capture input / PWM /
PWM2 output pins
Timer RE
TREO
O
Timer RE output pin
Serial interface
CLK0, CLK1
I/O
Clock I/O pin
RXD0, RXD1
I
Receive data input pin
TXD0, TXD1
O
Transmit data output pin
I2C bus interface
SCL
I/O
Clock I/O pin
SDA
I/O
Data I/O pin
Clock synchronous
serial I/O with chip
select
SSI
I/O
Data I/O pin
SCS
I/O
Chip-select signal I/O pin
SSCK
I/O
Clock I/O pin
SSO
I/O
Data I/O pin
Reference voltage
input
VREF
I
Reference voltage input pin to A/D converter
A/D converter
AN0 to AN11
I
Analog input pins to A/D converter
I/O port
P0_0 to P0_7,
P1_0 to P1_7,
P3_1, P3_3 to
P3_7,
P4_5,
P5_3, P5_4
I/O
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 port
P4_2, P4_6, P4_7
I
Input-only ports
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