UPD7554 datasheet, PDF - EEWORLD Datasheet

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UPD7554: Description4-BIT SINGLE-CHIP MICROCOMPUTER; File Size331KB，64 Pages; ManufacturerNEC ( Renesas ); Websitehttps://www2.renesas.cn/zh-cn/

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UPD7554 Overview

4-BIT SINGLE-CHIP MICROCOMPUTER

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DATA SHEET

MOS INTEGRATED CIRCUIT

PD7554A, 7554A(A)

4-BIT SINGLE-CHIP MICROCOMPUTER

DESCRIPTION

The

PD7554A is a product of the

PD7554, 7564 sub-series which is a 4-bit single-chip microcomputer with a

small number of ports in a small package, which is enabled to operate even at the super-low voltage of 2.0 V so

that it is optimized for handy-type systems operating with dry cells. The

PD7554A is a low-order model in the

PD7500 series (

PD7554A only).

This device incorporates a serial interface, and serves as the sub-CPU for a high-order model of that series or

the 8-bit microcomputer. It is optimized for distributed processing of the system.

The

PD7554A has outputs to directly drive a triac and LEDs and allows selection among many types of input/

output circuits using their respective mask options, sharply reducing the number of external circuits required.

Details of functions are described in the User’s Manual shown below. Be sure to read in design.

PD7554, 7564 User’s Manual: IEM-1111D

FEATURES

•

Range of supply voltage 7554A

: 2.0 to 6.0 V

7554A(A) : 2.7 to 6.0 V

•

Drive with two 1.5 V manganese cells

•

47 types of instructions

(Subset of

PD7500H SET B)

•

Instruction cycle

External clock : 2.86

s (in operation at 700 kHz, 5 V)

RC oscillation : 4

s (in operation at 500 kHz, 5 V)

•

Program memory (ROM) capacity: 1024

8 bits

•

Data memory (RAM) capacity: 64

4 bits

•

Test source: One external source and two internal

sources

•

8-bit timer/event counter

•

16 I/O lines (Total output current of all pins: 100 mA)

• Can directly drive a triac and a LED: P80 to P83

• Can directly drive LEDs: P100 to P103 and P110

to P113

• Mask option function provided for every port

•

8-bit serial interface

•

Standby (STOP/HALT) function

•

Low supply voltage data retaining function for data

memory

•

Built-in ceramic oscillator for system clock RC

Oscillation with an external resistor R (Incorporat-

ing capacitor C)

APPLICATION

PD7554A

: Sub-CPU including handy-type system, PPC, printer, VCR, audio equipments, etc.

PD7554A(A) : Automotive and transportation equipments, etc.

The quality level and absolute maximum ratings of the

PD7554A and the

PD7554A(A) differ.

Except where specifically noted, explanations here concern the

PD7554A as a representative product.

If you are using the

PD7554A(A), use the information presented here after checking the functional differences.

The information in this document is subject to change without notice.

Document No. IC-2419C

(O. D. No. IC-7835C)

Date Published January 1995 P

Printed in Japan

The mark

shows major revised points.

1994

1989

PD7554A, 7554A(A)

CONTENTS

1. PIN FUNCTIONS ........................................................................................................................................... 6

1.1

1.2

1.3

1.4

1.5

1.6

1.7

PORT FUNCTIONS ................................................................................................................................................. 6

OTHER THAN PORTS ............................................................................................................................................ 6

PIN MASK OPTION ................................................................................................................................................ 7

CAUTION ON USE OF P00/INT0 PIN AND RESET PIN ..................................................................................... 8

PIN INPUT/OUTPUT CIRCUITS ............................................................................................................................ 9

RECOMMENDED CONNECTION OF UNUSED

PD7554A PINS .................................................................... 12

OPERATION OF INPUT/OUTPUT PORTS .......................................................................................................... 13

2. INTERNAL BLOCK FUNCTIONS ............................................................................................................... 15

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

PROGRAM COUNTER (PC): 10 BITS .................................................................................................................. 15

STACK POINTER (SP): 6 BITS ............................................................................................................................ 16

PROGRAM MEMORY (ROM): 1024 WORDS

8 BITS ..................................................................................... 17

GENERAL REGISTER ........................................................................................................................................... 17

DATA MEMORY (RAM): 64

4 BITS ................................................................................................................. 18

ACCUMULATOR (A): 4 BITS ............................................................................................................................... 19

ARITHMETIC LOGIC UNIT (ALU): 4 BITS .......................................................................................................... 19

PROGRAM STATUS WORD (PSW): 4 BITS ...................................................................................................... 19

2.9 SYSTEM CLOCK GENERATOR ........................................................................................................................... 20

2.10 CLOCK CONTROL CIRCUIT ................................................................................................................................. 21

2.11 TIMER/EVENT COUNTER ................................................................................................................................... 22

2.12 SERIAL INTERFACE ............................................................................................................................................. 23

2.13 TEST CONTROL CIRCUIT .................................................................................................................................... 25

3. STANDBY FUNCTIONS .............................................................................................................................. 27

3.1

3.2

3.3

STOP MODE .......................................................................................................................................................... 27

HALT MODE .......................................................................................................................................................... 27

CANCELLING THE STANDBY MODE ................................................................................................................. 28

4. RESET FUNCTIONS .................................................................................................................................... 29

4.1

DETAILS OF INITIALIZATION ............................................................................................................................. 29

PD7554A INSTRUCTION SET ............................................................................................................... 30

6. ELECTRICAL SPECIFICATIONS .............................................................................................................. 35

7. CHARACTERISTICS CURVES .................................................................................................................. 47

PD7554A APPLIED CIRCUITS ............................................................................................................... 51

9. PACKAGE INFORMATION ....................................................................................................................... 52

10. RECOMMENDED PACKAGING PATTERN OF PLASTIC SOP (REFERENCE) ..................................... 56

11. RECOMMENDED SOLDERING CONDITIONS ....................................................................................... 57

UPD7554 Related Products

	UPD7554	UPD7554AG	UPD7554AGA	UPD7554ACS	UPD7554ACSA	UPD7554A	UPD7554AA
Description	4-BIT SINGLE-CHIP MICROCOMPUTER	4-BIT SINGLE-CHIP MICROCOMPUTER	4-BIT SINGLE-CHIP MICROCOMPUTER	4-BIT SINGLE-CHIP MICROCOMPUTER	4-BIT SINGLE-CHIP MICROCOMPUTER	4-BIT SINGLE-CHIP MICROCOMPUTER	4-BIT SINGLE-CHIP MICROCOMPUTER

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