PCA9537 查看數據表（PDF） - Philips Electronics

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PCA9537

4-bit I2C and SMBus low power I/O port with interrupt and reset

Philips Electronics 

Philips Semiconductors

4-bit I2C and SMBus low power I/O port

with interrupt and reset

Product data sheet

PCA9537

PROTOCOL

START

CONDITION

(S)

BIT 7

MSB

(A7)

t SU;STA

t LOW t HIGH

BIT 6

(A6)

1 / f SCL

BIT 1

(A1)

BIT 0 ACKNOWLEDGE

(R/W)

(A)

STOP

CONDITION

(S)

SCL

t BUF

tr

tf

SDA

t HD;STA

t SU;DAT

t HD;DAT

t VD;DAT

t VD;ACK

Figure 13. I2C-bus timing diagram; rise and fall times refer to VIL and VIH

tSU;STO

SW02328

START

SCL

ACK OR READ CYCLE

SDA

30%

RESET

50%

tREC

I/Ox

50%

tRESET

50%

tW

Figure 14. Definition of RESET timing

tRESET

50%

I/O configured as inputs

SW02340

2004 Nov 29

12

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