7547 datasheet(5/91 Pages) RENESAS

5 / 91 page

Rev.1.21

Nov 15, 2006

page 5 of 89

REJ03B0156-0121

7547 Group

PIN DESCRIPTION

Table 2 Pin description

Function

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

•Reference voltage input pin for A/D converter.

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

•Reset input pin for active “L”

•Input and output pins for main clock generating circuit.

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

•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.

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

Function expect a port function

Name

Power source

Analog refer-

ence voltage

CNVss

Reset input

Clock input

I/O port P0

I/O port P1

I/O port P2

I/O port P3

Vcc, Vss

VREF

CNVss

RESET

XIN

P00(LED00)/CAP0

P01(LED01)/CMP0

P02(LED02)/CMP1

P03(LED03)/TXOUT

P04(LED04)/RxD2

P05(LED05)/TxD2

P06(LED06)/SCLK2

P07(LED07)/SRDY2

P10/RxD1/CAP0

P11/TxD1

P12/SCLK1

P13/SRDY1

P14/CNTR0

P20/AN0–P27/AN7

P30(LED10)/CAP1

P31(LED11)/CMP2

P32(LED12)/CMP3

P33(LED13)/INT1

P34(LED14)

P35(LED15)

P36(LED16)/INT1

P37(LED17)/INT0

• Capture function pin

• Compare function pin

• Timer X function pin

• Serial I/O2 function pin

• Serial I/O1 function pin

• Capture function pin

• Serial I/O1 function pin

• Timer X function pin

• Input pins for A/D converter

• Capture function pin

• Compare function pin

• Interrupt input pin

•8-bit I/O port.

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

grammed as either input or output.

•CMOS compatible input level

•CMOS 3-state output structure

•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.

•5-bit I/O port

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

grammed as either input or output.

•CMOS compatible input level

•CMOS 3-state output structure

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

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

•CMOS compatible input level

•CMOS 3-state output structure

•8-bit I/O port

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

grammed as either input or output.

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

for P36 and P37).

•CMOS 3-state output structure

•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.

XOUT

Clock output

• Key-input

(key-on

wake up

interrupt

input) pin

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