saa4700t NXP Semiconductors, saa4700t Datasheet - Page 11

• Manufacturer Part Number: saa4700t
• Description: Saa4700t Vps Dataline Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
I
Remarks to I
March 1991
2
handbook, full pagewidth
S
S
SLAVE ADDRESS
A
DATA
P
C-BUS FORMAT
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.
VPS dataline processor
SLAVE ADDRESS
2
C-bus transmission
CVBS
V P
4.7 k
=
=
=
=
=
22
nF
1 nF
A
5 V
n.c.
20
8.2 k
1
DATA
start condition
0010 0001 or 0010 0011 for set input AD = HIGH respectively LOW on pin 8
(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
470
pF
19
2
4.7
4.7
nF
nF
18
3
A
Fig.6 Application circuit.
0.1 F
17
4
DATA
SAA4700T
16
5
11
0.1
F
CSO
15
6
A
75 k
(2%)
n.c.
n.c.
14
DATA
7
DAV
13
8
SCL
A
12
9
DATA
SDA
MEH136
11
10
Preliminary specification
A
SAA4700T
DATA
P