7545 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

7545

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Renesas Electronics 

7545 Group

PIN DESCRIPTION

Table 3 Pin description

Pin

VCC, VSS

VDDR

CNVSS

RESET

XIN

XOUT

P00/KEY0−

P07/KEY7

P10, P11

P20(LED0)/INT0

P21(LED1)/INT1

P22(LED2)−

P27(LED7)

P30−P37

P40(LED8),

P41(LED9)

P42/CARR

Name

Power source

Power source

CNVSS

Reset I/O

Clock input

Clock output

I/O port P0

I/O port P1

I/O port P2

I/O port P3

I/O port P4

Function

Function expect a port function

• Apply voltage of 1.8 to 3.6V to VCC, and 0 V to VSS.

• Power source pin only for RAM2. When this pin is used, connect an approximately 0.1 µF

bypass capacitor across the VSS line and the VDDR line. When not used, connect it to VSS.

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

• An N-channel open-drain I/O pin for a system reset. This pin has a pull-up transistor. When the

watchdog timer, the built-in power-on reset or the voltage drop detection circuit causes the

system to be reset, the RESET pin outputs "L" level.

• Input and output pins for main clock generating circuit

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

• 8-bit I/O port.

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

programmed as either input or output.

• CMOS compatible input level

• CMOS 3-state output structure

• Whether the pull-up function/key-on wakeup function

is to be used or not can be determined by program.

• Key-input (key-on wake up interrupt

input) pins

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

• CMOS compatible input level

• The output structure can be switched to N-channel

open-drain or CMOS by software.

Note: RLSS-only pins

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

• CMOS compatible input level

• The output structure can be switched to N-channel

open-drain or CMOS by software.

• P2 can output a large current for driving LED.

• Interrupt input pins

• 8-bit I/O port

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

• CMOS compatible input level

• The output structure can be switched to N-channel open-drain or CMOS by software.

• 2-bit I/O port having almost the same function as P0. Note: RLSS-only pins

• CMOS compatible input level

• CMOS 3-state output structure

• 1-bit I/O port

• CMOS compatible input level

• CMOS 3-state output structure

• Carrier wave output pin for remote-

control transmit

Rev.1.06 Mar 07, 2008 Page 7 of 59

REJ03B0140-0106

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