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TDA8204B View Datasheet(PDF) - STMicroelectronics

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TDA8204B
ST-Microelectronics
STMicroelectronics ST-Microelectronics
TDA8204B Datasheet PDF : 12 Pages
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TDA8204B
CR2 : NICAM control (read and write register)
SDI ECT MAE FN1 UMT LA1 LA0 BEA
0
0
0
0
0
0
0
1
MSB
LSB
SDI : I2S direction
0 = Output, 1 = Input
ECT : Bit error rate counting time
0 = 128ms, 1 = 64ms
MAE : Max allowed errors
0 = 511, 1 = 255
FN1 : Set function of bit 0 in SR0, 0 = loss of
alignment (status), 1 = system status (I or
B/G)
UMT : Un-mute NICAM, 1 = un-mute, 0 = mute
LA1 : Language select 1 (LA1 SEL1)
LA0 : Language select 0 (LA0 SEL0)
BEA : Set C1-C3 function
ECT
0
0
1
1
MAE
0
1
0
1
BER MUTE
8.9 x 10-3 (1 in 112)
4.4 x 10-3 (1 in 225)
1.8 x 10-2 (1 in 56)
8.9 x 10-3 (1 in 112)
Un-mute at BER/4.
TDA8204B
Output (Pin)
C1 (21)
C2 (20)
C3 (19)
BEA
0
1
C1*
Single mono mode
C2*
Dual mono mode
C3*
Stereo mode
* Application control bit of NICAM signal
Note : C4 pin remains unchanged. The function of C1-C4 in SR0
remains unchanged.
CR3 : Switches (read and write register)
US1 US0 AUT IBG FS1 FS0 X SYN
0
0
1
0
0
0
0
1
MSB
LSB
US1 : User bit 1 (output)
US0 : User bit 0 (output)
AUT : Automatic selection, 1 = enable
IBG : Select system I or B/G, 1 = B/G
FSn : Force switch (see table)
SYN : 1 = synthesiser, 0 = dual VCXO
(carrier loop)
FS1
FS0
Selection
0
0
Auto NICAM
0
1
FM-Mono
1
0
FM-Stereo
1
1
NICAM
NICAM STAND-ALONE APPLICATION
The NICAM kit has been designed to be monitored
by the I2C bus; nevertheless stand-alone working
capability is offered to the designer for low cost
8/12
applications.
In order to know the status of the kit in stand-alone
mode, consider the contents of the four I2C regis-
ters at power-ON (4 registers : SR0 - CR1 - CR2 -
CR3). Hardware configurable pins will be described
later.
1 - Power-ON Configuration
SR0 (status)
US2 C1 C2 C3 C4 MUT LA2 L/S
US2 0
0
0
1
1
1
1
MSB
LSB
US2 : Not used in stand-alone
C1
C2
C3
:
:
:
Application control bit status for
NICAM signal
C4 : Reserve Sound Flag
MUT : DAC outputs muted (demuted as soon
as NICAM appears)
LA2 : the subframe alignment is been lost
L/S : FAW status (FN1 of CR2 = 0)
CR1 (R/W)
Q1 Q0 I2 I1 I0 G0 AUM FRE
0
0
0
0
0
0
0
0
MSB
LSB
Q1 :
Q0 : NICAM sound is sent on all matrix
I2 : outputs and on AMOx pins
I1 :
G0 : Gain = 0dB on AMOx
AUM : AMOx pins un-muted
FRE : VCXO in normal mode
CR2 (R/W)
SDA ECT MAE FN1 UMT LA1 LA0 BEA
0
0
0
0
0
0
0
1
MSB
LSB
SDA : Normal mode
ECT & : BER = 1/112
MAE
FN1 : Bit L/S of SR0 set to alignment loss
status
UMT : TDA8204B mute pin 25 to 0
LA1 : Result depending of SEL1
LA0 : Result depending of SEL0
BEA
: Beacon decoding mode but all diodes
are OFF until a NICAM signal has been
found
CR3 (R/W)
US1 US0 AUT IBG FS1 FS0 X SYN
0
0
1
0
0
0
0
1
MSB
LSB
US1 : Not used in stand-by mode
US0 : Not used in stand-by mode
AUT : Automatic standard
 

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