SAA4700 Просмотр технического описания (PDF) - Philips Electronics

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производитель

SAA4700

VPS dataline processor

Philips Electronics 

Philips Semiconductors

VPS dataline processor

Preliminary specification

SAA4700

handbook, full pagewidth

VP

+5 V

22

4.7

nF 8.2 kΩ nF

n.c.

0.1 µF

75 kΩ

(2%)

DAV

18 17 16 15 14 13 12 11 10

SAA4700

1

2

3

4

5

6

7

8

9

1 nF

4.7

nF

0.1

µF

470

4.7 kΩ pF

CSO

SCL SDA

CVBS

MEH135

Fig.6 Application circuit.

I2C-BUS FORMAT

S SLAVE ADDRESS A DATA A DATA A DATA A DATA A DATA P

S

=

start condition

SLAVE ADDRESS =

A

=

DATA

=

P

=

0010 0001 or 0010 0011 for set input AD = HIGH respectively LOW on pin 7

(the circuit is only a slave transmitter)

acknowledge, generated by the slave or the master

five data bytes, see words in Table 1

stop condition respectively non-acknowledge by the microcontroller

Remarks to I2C-bus transmission

• the MSB of each word is transmitted first

• there is no restriction on the number of words to be transmitted, but if more than five words are requested, the following

content will be “FF” continuously.

• Normally every dataline transmission has to be ended with STOP condition by non-acknowledge of the controller.

March 1991

10

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