4570 datasheet(5/69 Pages) RENESAS

5 / 69 page

MITSUBISHI MICROCOMPUTERS

4570 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

PIN DESCRIPTION

Name

Power supply

Ground

CNVSS

Reset input

Clock input

Clock output

Output port D

I/O port P0

I/O port P1

Input port P2

I/O port P3

Input port P4

Carrier wave output

for remote control

Interrupt input

Timer output

Voltage drop

detection circuit

enable

Input/Output

—

Input

I/O

Input

Output

I/O

Input

Output

Input

Output

Input

Function

Connected to a plus power supply.

Connected to a 0 V power supply.

Connect CNVSS to VSS and apply “L” (0V) to CNVSS certainly.

An N-channel open-drain I/O pin for a system reset. A pull-up transistor and a

capacitor are built-in this pin. When the watchdog timer causes the system to be

reset or the low-supply voltage is detected, the RESET pin outputs “L” level.

I/O pins of the clock generating circuit. Connect a ceramic resonator between XIN

pin and XOUT pin. A feedback resistor is built-in between them.

Each pin of port D has an independent 1-bit wide output function. Port D9 is also

used as TOUT output pin. The output structure is N-channel open-drain.

4-bit I/O port. It can be used as an input port when the output latch is set to “1.”

The output structure is N-channel open-drain. Every pin of the ports has a key-on

wakeup function and a pull-up function.

4-bit I/O port. It can be used as an input port when the output latch is set to “1.”

The output structure is N-channel open-drain. Every pin of the ports has a key-on

wakeup function and a pull-up function.

2-bit input port. Port P21 is also used as the INT input pin.

4-bit I/O port. It can be used as an input port when the output latch is set to “1.”

The output structure is N-channel open-drain.

4-bit input port. Every pin of the ports has a key-on wakeup function and a pull-up

function. Both functions can be switched by software.

Carrier wave output pin for remote control transmit. The output structure is the

CMOS circuit.

INT input pin accepts an external interrupt and has a key-on wakeup function. INT

input pin is also used as port P21.

TOUT output pin has the function to output the timer 2 underflow signal divided by

2. TOUT output pin is also used as port D9.

VDCE pin is used to control the operation/stop of the voltage drop detection circuit.

The circuit is operating when “H” level is input to the VDCE pin. It is stopped when

“L” level is input to this pin.

VDD

VSS

CNVSS

RESET

XIN

XOUT

D0–D9

P00–P03

P10–P13

P20, P21

P30–P33

P40–P43

CARR

INT

TOUT

VDCE

4570 Datasheet(PDF) 5 Page - Renesas Technology Corp

4570 Datasheet(HTML) 5 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

Datasheet Download

Link URL