HD404848 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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Компоненты Описание

производитель

HD404848

4-Bit Single-Chip Microcomputer

Hitachi -> Renesas Electronics 

HD404849 Series

Pin Description

Item

Power supply

Test

Reset

Oscillator

Port

Interrupt

Stop clear

Serial

Timer

Pin Number

Symbol

FP-80A ,TFP-80C FP-80B

I/O Function

VCC

73

75

Applies power voltage

GND

10

12

Connected to ground

TEST

4

6

I Used for factory testing only: Connect

this pin to GND

RESET

7

9

I Resets the MCU

OSC1

5

7

I Input/output pins for the internal

oscillator circuit:

Connect them to a ceramic oscillator

or connect OSC1 to an external

oscillator circuit.

OSC2

6

X1

8

8

O

10

I Used for a 32.768-kHz crystal for

clock purposes. If not to be used, fix

the X1 pin to VCC and leave the X2

pin open.

X2

9

11

O

D0–D8

11–19

13–21

I/O Input/output pins addressed by

individual bits; pins D0–D8 are high-

current pins that can each supply up

to 15 mA

D10, D11

20, 21

22, 23

I Input pins addressable by individual

bits

R0–R3, R6, 22–33, 79, 80,

R7

1, 2, 34–41

24–35, 1–4, I/O Input/output pins addressable in 4-bit

36–43

units

INT0, INT1,

INT2, INT3

STOPC

21–24

20

23–26

22

I Input pins for external interrupts

I Input pin for transition from stop mode

to active mode

SCK

31

33

I/O Serial clock input/output pin

SI

32

34

I Serial receive data input pin

SO

33

35

O Serial transmit data output pin

TOB, TOC, 26–28

TOD

28–30

O Timer output pins

EVNB,

EVND

29, 30

31, 32

I Event count input pins

4

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