參數(shù)資料
型號(hào)： TDA9875AH
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： Digital TV Sound Processor DTVSP
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： PLASTIC, QFP
文件頁(yè)數(shù)： 46/96頁(yè)
文件大?。?/td> 296K
代理商： TDA9875AH
1999 Dec 20
46
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9875A
10.3.13 NICAM
LOWER ERROR LIMIT REGISTER
When the auto-mute function is enabled (bit AMUTE in the
NICAM configuration register) and the NICAM bit error
count is lower than the value contained in this register, the
NICAM signal is selected (again) for reproduction
(see Section 10.3.14).
Table 34
Subaddress 16 (notes 1 and 2)
Notes
1.
2.
The default setting at power-up is 0001 0100.
The lower bit error rate
limit
subaddress 16
×
1.74
×
10
5
.
10.3.14 NICAM
UPPER ERROR LIMIT REGISTER
When the auto-mute function is enabled (bit AMUTE in the
NICAM configuration register) and the NICAM bit error
countishigherthanthevaluecontainedinthisregister,the
signalofthefirstsoundcarrier(i.e.FM monoorAM sound)
or the external mono input (depending on bit AMSEL and
ADC output selection) is selected for reproduction.
The difference between upper and lower error limit
constitutes a hysteresis to avoid frequent switching
between NICAM and the program on the first sound
carrier.
Table 35
Subaddress 17 (notes 1 and 2)
Notes
1.
2.
The default setting at power-up is 0101 0000.
The upper bit error rate
limit
subaddress 17
×
1.74
×
10
5
.
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
6
5
4
3
2
1
0 (LSB)
B7
B6
B5
B4
B3
B2
B1
B0
lower error limit value
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
6
5
4
3
2
1
0 (LSB)
B7
B6
B5
B4
B3
B2
B1
B0
upper error limit value
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