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参数资料
型号： R5F21258SDXXXFP
元件分类： 微控制器/微处理器
英文描述： 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP52
封装： 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52
文件页数： 3/59页
文件大小： 528K
代理商： R5F21258SDXXXFP
R8C/24 Group, R8C/25 Group
1. Overview
Rev.3.00
Feb 29, 2008
Page 11 of 51
REJ03B0117-0300
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
Description
Power supply input
VCC, VSS
I
Apply 2.2 V 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
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
XCOUT
O
INT interrupt input
INT0 to INT3
I
INT interrupt input pins.
INT0 is timer RD input pin. INT1 is timer RA input pin.
Key input interrupt
KI0 to KI3
I
Key input interrupt input pins
Timer RA
TRAIO
I/O
Timer RA I/O pin
TRAO
O
Timer RA output pin
Timer RB
TRBO
O
Timer RB output pin
Timer RD
TRDIOA0, TRDIOA1,
TRDIOB0, TRDIOB1,
TRDIOC0, TRDIOC1,
TRDIOD0, TRDIOD1
I/O
Timer RD I/O ports
TRDCLK
I
External clock input pin
Timer RE
TREO
O
Divided clock output pin
Serial interface
CLK0, CLK1
I/O
Transfer clock I/O pin
RXD0, RXD1
I
Serial data input pins
TXD0, TXD1
O
Serial data output pins
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,
P2_0 to P2_7,
P3_0, P3_1,
P3_3 to P3_5, P3_7,
P4_3 to P4_5,
P6_0 to P6_7
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.
P2_0 to P2_7 also function as LED drive ports.
Input port
P4_2, P4_6, P4_7
I
Input-only ports
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