参数资料
型号: R5F21194NP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQCC28
封装: 5 X 5 MM, 0.50 MM PITCH, PLASTIC, WQFN-28
文件页数: 2/41页
文件大小: 725K
代理商: R5F21194NP
R8C/18 Group, R8C/19 Group
1. Overview
Rev.1.40
Apr 14, 2006
Page 10 of 38
REJ03B0124-0140
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 2.7 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 comparator
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.
Main clock input
XIN
I
These pins are provided for main 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.
Main clock output
XOUT
O
INT interrupt
INT0, INT1, INT3
IINT interrupt input pins
Key input interrupt
KI0 to KI3
I
Key input interrupt input pins
Timer X
CNTR0
I/O
Timer X I/O pin
CNTR0
O
Timer X output pin
Timer Z
TZOUT
O
Timer Z output pin
Timer C
TCIN
I
Timer C input pin
CMP0_0 to CMP0_2,
CMP1_0 to CMP1_2
O
Timer C output pins
Serial interface
CLK0
I/O
Transfer clock I/O pin
RXD0, RXD1
I
Serial data input pins
TXD0, TXD1
O
Serial data output pins
Reference voltage
input
VREF
I
Reference voltage input pin to comparator
Comparator
AN8 to AN11
I
Analog input pins to comparator
I/O port
P1_0 to P1_7, P3_3
to P3_5, P3_7, P4_5
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_3 also function as LED drive ports.
Input port
P4_2, P4_6, P4_7
I
Input-only ports
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