7534 datasheet(21/221 Pages) RENESAS

21 / 221 page

HARDWARE

7534 Group

Rev.3.00

Oct 23, 2006

page 8 of 55

REJ09B0178-0300

PIN DESCRIPTION

Table 1 Pin description

Vcc, Vss

VREF

USBVREFOUT

CNVss

RESET

P00–P07

P10/RxD/D-

P11/TxD/D+

P12/SCLK

P13/SDATA

P14/CNTR0

P15, P16

XIN

Function

•Apply voltage of 4.1 to 5.5 V (4.4 to 5.25 V at USB operating) to Vcc, and 0 V to Vss.

•Reference voltage input pin for A/D converter

•Output pin for pulling up a D- line with 1.5 k

Ω external resistor

•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.

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

Function expect a port function

Name

Power source

Analog reference

voltage

USB reference

voltage output

CNVss

Reset input

Clock input

I/O port P0

I/O port P1

I/O port P2

I/O port P3

I/O port P4

•8-bit I/O port.

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

as either input or output.

•CMOS 3-state output structure at CMOS compatible input level

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

determined by program.

•7-bit I/O port

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

as either input or output.

•CMOS 3-state output structure at CMOS compatible input level

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

•When using the USB function, input level of ports P10 and P11

becomes USB input level, and output level of them becomes

USB output level.

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

•CMOS 3-state output structure at CMOS compatible input level

•8-bit I/O port

•I/O direction register allows each pin to be individually programmed as either input or output.

•CMOS 3-state output structure at CMOS compatible input level (CMOS/TTL level can be switched

for P36, P37).

•P30 to P36 can output a large current for driving LED.

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

determined by program.

•2-bit I/O port

•I/O direction register allows each pin to be individually programmed as either input or output.

•Key-input (key-on wake up

interrupt input) pins

•Serial I/O1 function pin

•Serial I/O2 function pin

•Timer X function pin

•Input pins for A/D converter

•Interrupt input pins

XOUT

Clock output

P20/AN0–

P27/AN7

P30–P35

P36/INT1

P37/INT0

P40, P41

PIN DESCRIPTION

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