HD404849 datasheet(6/127 Pages) RENESAS

Part #	HD404849

Description	4-Bit Single-Chip Microcomputer

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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6 / 127 page

HD404849 Series

4

Pin Description

Pin Number

Item

Symbol

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

I/O

Function

Power supply

V

CC

73

75

Applies power voltage

GND

10

12

Connected to ground

Test

TEST

4

6

I

Used for factory testing only: Connect

this pin to GND

Reset

RESET

7

9

I

Resets the MCU

Oscillator

OSC

1

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.

OSC

2

68

O

X1

8

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

Port

D

0–D 8

11–19

13–21

I/O

Input/output pins addressed by

individual bits; pins D

0–D 8 are high-

current pins that can each supply up

to 15 mA

D

10, D11

20, 21

22, 23

I

Input pins addressable by individual

bits

R0–R3, R6,

R7

22–33, 79, 80,

1, 2, 34–41

24–35, 1–4,

36–43

I/O

Input/output pins addressable in 4-bit

units

Interrupt

INT

0, INT1,

INT

2, INT3

21–24

23–26

I

Input pins for external interrupts

Stop clear

STOPC

20

22

I

Input pin for transition from stop mode

to active mode

Serial

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

Timer

TOB, TOC,

TOD

26–28

28–30

O

Timer output pins

EVNB,

EVND

29, 30

31, 32

I

Event count input pins

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HD404849 Datasheet(PDF) 6 Page - Renesas Technology Corp

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