SAA7282GP Philips Semiconductors, SAA7282GP Datasheet - Page 7

• Manufacturer Part Number: SAA7282GP
• Description: Terrestrial Digital Sound Decoder TDSD2
• Manufacturer: Philips Semiconductors

Philips Semiconductors
I
The SAA7282 contains an I
The device slave address is A(7:1)(R/W) = 101101X(R/W). An ADSEL pin is provided to allow selection of one of two
different slave addresses via programmable address bit A1. (X = ADSEL logic level).
The SAA7282 does not acknowledge the I
The slave receiver format is:
S SLAVE_ADDR.0 ACK SUB_ADDR ACK DATA BYTE ACK P
Where S = start, ACK = acknowledge, P = stop.
Auto-increment of the sub-address is provided with wrap-around from 02 (HEX) to 00 (HEX).
The slave receiver data byte format, as a function of sub-address, is as shown in Table 1.
Table 1 Slave receiver data byte.
M1/M2
This bit in conjunction with DMSEL bit, determines the output configuration in dual mono mode (see Table 2).
Power-on resets to logic 1.
DMSEL
This bit determines whether one or both of the dual mono signals are output (see Table 2). Power-on resets to logic 0.
PORT2
PORT2 controls a bit out, providing direct access to a dedicated output pin (PORT2) via the I
Power-on resets to logic 0.
SSWIT3/2/1
These bits control the analog switching, selecting between the FM, external, and NICAM signals. With the NICAM source
the signals select whether the de-emphasis is performed and what gain is applied after the filtering and de-emphasis
stage. The signal states and their meaning are listed in Table 4. Power-on resets to 0/1/0.
July 1993
2
ADDRESS
C-BUS FORMATS
Read decoder status information derived from the transmitted digital audio signal
Read an error count byte to determine the bit error rate for user mute purposes and to indicate quality of NICAM signal
Read additional transmitted data bits. Their purpose has yet to be defined but accessibility is provided to allow future
services to be implemented in receiver software
Write control codes to select the available analog switching configurations
Write upper and lower error count limits for automatic muting function
Terrestrial Digital Sound Decoder (TDSD2)
SUB-
00
01
10
RESET
VALUE
HEX
90
50
14
2
C-bus slave transceiver permitting a master device to:
M1/M2
EMAX7
EMIN7
D7
DMSEL
EMAX6
EMIN6
2
D6
C-bus general call address.
n bytes
SSWIT3
EMAX5
EMIN5
D5
7
SSWIT2
EMAX4
EMIN4
D4
SSWIT1
EMAX3
EMIN3
D3
PORT2
EMAX2
EMIN2
D2
2
C-bus. See Table 3.
MUTEDEF
EMAX1
EMIN1
Product specification
D1
SAA7282
AMDIS
EMAX0
EMIN0
D0