R5F21112FP Datasheet, PDF (6/29 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

R8C/11 Group
1. Overview
1.6 Pin Description
Table 1.3 shows the pin description
Table 1.3 Pin description
Signal name
Power supply
input
IVcc
Pin name
Vcc,
Vss
IVcc
I/O type
I
O
Analog power AVcc, AVss
I
supply input
___________
Reset input
RESET
I
CNVss
CNVss
I
MODE
MODE
I
Main clock input XIN
I
Main clock output XOUT
O
_____
_______
_______
INT interrupt input INT0 to INT3 I
_____
_____
Key input interrupt KI0 to KI3
I
Timer X
CNTR0
I/O
____________
CNTR0
O
Timer Y
CNTR1
I/O
Timer Z
TZOUT
O
Timer C
TCIN
I
CMP00 to CMP03, O
CMP10 to CMP13
Serial interface CLK0
I/O
RxD0, RxD1
I
TxD0, TxD10, O
TxD11
Reference voltage VREF
I
input
A/D converter AN0 to AN11 I
I/O port
P00 to P07,
I/O
P10 to P17,
P30 to P33, P37,
P45
Input port
P46, P47
I
Function
Apply 2.7 V to 5.5 V to the Vcc pin. Apply 0 V to the
Vss pin.
This pin is to stabilize internal power supply.
Connect this pin to Vss via a capacitor (0.1 µF).
Do not connect to Vcc.
These are power supply input pins for A/D converter.
Connect the AVss pin to Vss. Connect a capacitor
between pins AVcc and AVss.
“L” on this input resets the MCU.
Connect this pin to Vss via a resistor.
Connect this pin to Vcc via a resistor.
These pins are provided for the main clock generat-
ing circuit I/O. Connect a ceramic resonator or a crys-
tal oscillator between the XIN and XOUT pins. To use
an externally derived clock, input it to the XIN pin and
leave the XOUT pin open.
______
These are INT interrupt input pins.
These are key input interrupt pins.
This is the timer X I/O pin.
This is the timer X output pin.
This is the timer Y I/O pin.
This is the timer Z output pin.
This is the timer C input pin.
These are the timer C output pins.
This is a transfer clock I/O pin.
These are serial data input pins.
These are serial data output pins.
This is a reference voltage input pin for A/D con-
verter.
These are analog input pins for A/D converter.
These are 8-bit CMOS I/O ports. Each port has an
input/output select direction register, allowing each
pin in that port to be directed for input or output indi-
vidually.
Any port set to input can select whether to use a pull-
up resistor or not by program.
P10 to P17 also function as LED drive ports.
These are input only pins.
Rev.1.40 Sep 30, 2004 page 6 of 26
REJ03B0034-0140Z