REJ03F0265-0200 Rev.2.00 Mar 18, 2008

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M66014FP

16-bit Serial Bus Controller

REJ03F0265-0200

Rev.2.00

Mar 18, 2008

Description

M66014 semiconductor integrated circuit is a serial bus controller. It converts 2-byte parallel data that arrives from

microcomputer into serial and outputs it to serial bus. It also converts serial data input from serial bus into parallel and

outputs it to microcomputer.

The M66014 is used for the extension of microcomputer I/O ports and two-way communication with peripheral

equipment connected with serial buses.

Features

• Compatible with general-purpose 8-bit microprocessor busses

• TTL level input (one microcomputer side)

• Interrupt output

• Schmitt input (RESET, CS, SIN)

• Pin arrangement is fully compatible with M66011FP

• Low power dissipation

• Wide operating temperature range (Ta = –20 to 75°C)

Application

Microcomputer I/O port extension, etc.

Block Diagram

Reset input

Chip select input

Write input

Read input

Clock input

Clock output

Data bus

1

21

22

3

2

23

15

14

4

Xin

Xout

D0

5

D1

6

D2

7

D3

8

D4

9

D5

10

D6

11

D7

8

8

A1

Timing

control

circuit

Shift register for lower

byte serial output (8 bits)

CLK, LOAD

CLK

Shift register for upper

byte serial output (8 bits)

Shift register for serial

input (16-bit)

Read

register

CLK, LOAD

Oscillation

circuit

A0

8

8

RESET

WR

RD

Interrupt output

Shift clock output

Output enable output

Serial data output

Serial data input

20

16

17

19

18

SCLK

INT

SOUT

SIN

OE

CS