SAA7710T/N104 PHILIPS [NXP Semiconductors], SAA7710T/N104 Datasheet - Page 8

• Manufacturer Part Number: SAA7710T/N104
• Description: Dolby* Pro Logic Surround; Incredible Sound
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
I
I
For communication with external digital sources and or
additional external processors the I
bus is used. It is a serial 3-line bus, with one line for data,
one line for clock and one line for the word select.
Figure 5 shows an excerpt of the Philips I
specification interface report regarding the general timing
and format of I
channel word, logic 1 means right channel word.
The serial data is transmitted in two’s complement with the
MSB first. One clock period after the negative edge of the
word select line the MSB of the left channel is transmitted.
Data is synchronised with the negative edge of the clock
and latched at the positive edge.
1998 Mar 13
2
2
handbook, full pagewidth
S-bus Interfaces and system clock
S-
Dolby* Pro Logic Surround;
Incredible Sound
BUS BASICS
SCK
2
WS
SD
S-bus. Word Select (WS) logic 0 means left
SCK
SD
LEFT
MSB
WS
2
S-bus digital interface
2
S-bus
Fig.5 I
T cy
2
S-bus timing and format.
t LC 0.35 T
t sr 0.2 T
8
I
The I
following way using the SEL-IN1/IN2 bit (see Table 4):
1. I
2. I
The incoming bit-clock frequency defines the accuracy in
terms of number of bits of the incoming data samples.
The input circuit is designed to accept any number of bits
per channel up to a maximum of 18 bits. The accepted
data format is MSB-first.
2
S-
BUS INPUT CIRCUIT
(SEL-IN1/IN2 bit = logic 0(default))
2
2
t HC 0.35 T
2
S input 1 is master
S input 2 is master (SEL-IN1/IN2 bit = logic 1).
S-bus input circuits can be configured in the
t hr 0
RIGHT
MSB
V IH (70%)
V IH (70%)
V IL (20%)
V IL (20%)
MBH173
Product specification
SAA7710T