PCF8584 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Lista de partido

PCF8584

I2C-bus controller

Philips Electronics 

Philips Semiconductors

I2C-bus controller

Product specification

PCF8584

5 PINNING

SYMBOL

PIN

CLK

1

SDA or

2

SDA OUT

SCL or SCL IN 3

IACK or

4

SDA IN

INT or

5

SCL OUT

A0

6

DB0

7

DB1

8

DB2

9

VSS

10

DB3

11

DB4

12

DB5

13

DB6

14

DB7

15

RD (DTACK)

16

CS

17

WR (R/W)

18

RESET/

19

STROBE

VDD

20

I/O

I

I/O

I/O

I

O

I

I/O

I/O

I/O

−

I/O

I/O

I/O

I/O

I/O

I/(O)

I

I

I/O

−

DESCRIPTION

clock input from microcontroller clock generator (internal pull-up)

I2C-bus serial data input/output (open-drain). Serial data output in long-distance

mode.

I2C-serial clock input/output (open-drain). Serial clock input in long-distance mode.

Interrupt acknowledge input (internal pull-up); when this signal is asserted the

interrupt vector in register S3 will be available at the bus Port if the ENI flag is set.

Serial data input in long-distance mode.

Interrupt output (open-drain); this signal is enabled by the ENI flag in register S1.

It is asserted when the PIN flag is reset. (PIN is reset after 1 byte is transmitted or

received over the I2C-bus). Serial clock output in long-distance mode.

Register select input (internal pull-up); this input selects between the control/status

register and the other registers. Logic 1 selects register S1, logic 0 selects one of

the other registers depending on bits loaded in ESO, ES1 and ES2 of register S1.

bidirectional 8-bit bus Port 0

bidirectional 8-bit bus Port 1

bidirectional 8-bit bus Port 2

ground

bidirectional 8-bit bus Port 3

bidirectional 8-bit bus Port 4

bidirectional 8-bit bus Port 5

bidirectional 8-bit bus Port 6

bidirectional 8-bit bus Port 7

RD is the read control input for MAB8049, MAB8051 or Z80-types. DTACK is the

data transfer control output for 68000-types (open-drain).

chip select input (internal pull-up)

WR is the write control input for MAB8048, MAB8051, or Z80-types

(internal pull-up). R/W control input for 68000-types.

Reset input (open-drain); this input forces the I2C-bus controller into a predefined

state; all flags are reset, except PIN, which is set. Also functions as strobe output.

supply voltage

1997 Oct 21

5

Share Link: