7546 查看數據表（PDF） - Renesas Electronics

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7546

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Renesas Electronics 

7546 Group

PIN DESCRIPTION

Table 2 Pin description

Pin

Vcc, Vss

Name

Function

Power source Apply voltage of 1.8 to 5.5 V to Vcc, and 0 V to Vss.

Function expect a port function

VREF

Analog refer- •Reference voltage input pin for A/D converter.

ence voltage

CNVss

CNVss

•Chip operating mode control pin, which is always connected to Vss.

RESET

Reset input •Reset input pin for active “L”

XIN

Clock input •Input and output pins for main clock generating circuit.

•Connect a ceramic resonator or quartz crystal oscillator between the XIN and XOUT pins.

XOUT

Clock output

•For using RC oscillator, short between the XIN and XOUT pins, and connect the capacitor and resistor.

•If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.

P00(LED00)/CAP0 I/O port P0

P01(LED01)/CMP0

P02(LED02)/CMP1

P03(LED03)/TXOUT

P04(LED04)/RxD2

•When the on-chip oscillator is selected as the main clock, connect XIN pin to VCC and leave XOUT open.

•8-bit I/O port.

• Capture function pin • Key-input

•I/O direction register allows each pin to be individually pro- • Compare function pin (key-on

grammed as either input or output.

wake up

•CMOS compatible input level

• Timer X function pin interrupt

•CMOS 3-state output structure

• Serial I/O2 function pin input) pin

P05(LED05)/TxD2

•Whether a built-in pull-up resistor is to be used or not can be

P06(LED06)/SCLK2

determined by program.

P07(LED07)/SRDY2

• High drive capacity for LED drive port can be selected by program.

P10/RxD1/CAP0 I/O port P1

•5-bit I/O port

• Serial I/O1 function pin

•I/O direction register allows each pin to be individually pro- • Capture function pin

P11/TxD1

grammed as either input or output.

• Serial I/O1 function pin

P12/SCLK1

•CMOS compatible input level

P13/SRDY1

•CMOS 3-state output structure

P14/CNTR0

•CMOS/TTL level can be switched for P10, P12 and P13

• Timer X function pin

P20/AN0–P25/AN5 I/O port P2

•6-bit I/O port having almost the same function as P0

• Input pins for A/D converter

•CMOS compatible input level

•CMOS 3-state output structure

P30(LED10)/CAP1 I/O port P3

•6-bit I/O port

• Capture function pin

P31(LED11)/CMP2

•I/O direction register allows each pin to be individually pro- • Compare function pin

P32(LED12)/CMP3

grammed as either input or output.

P33(LED13)/INT1

•CMOS compatible input level (CMOS/TTL level can be switched • Interrupt input pin

P34(LED14)

for P37).

P37(LED17)/INT0

•CMOS 3-state output structure

• Interrupt input pin

•Whether a built-in pull-up resistor is to be used or not can be

determined by program.

• High drive capacity for LED drive port can be selected by program.

Rev.1.21 Nov 15, 2006 page 8 of 93

REJ03B0160-0121

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