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參數資料
| 型號： | 93526374557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO DEMODULATOR, PQFP44 |
| 封裝： | PLASTIC, SOT-205, QFP-44 |
| 文件頁數： | 37/71頁 |
| 文件大小： | 269K |
| 代理商： | 93526374557 |
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2000 Aug 04
42
Philips Semiconductors
Product specication
Digital TV sound demodulator/decoder
TDA9874A
7.3.23
EASY STANDARD PROGRAMMING (ESP) REGISTER
This register is used to simplify the setting of different TV
sound standards via the I2C-bus. Writing to this register
will overwrite the contents of registers 3 to 10 with the
settings needed to demodulate one of the standards
shown in Table 68. After power-up, the default setting has
no effect on the settings of registers 3 to 10. Old values of
registers 3 to 10 are not stored. Demodulators filter the
bandwidth and identification time constants are also set
independently from the chosen standard selected in this
register.
This means for I2C-bus refreshing: using the ESP option,
registers 3 to 10 should not be overwritten during a
refresh.
If ESP is not used, the ESP register should not be
accessed in the refresh routine.
Demodulators filter bandwidth and identification time
constants are also set independently in this register.
The default setting after Power-on reset is 0000 0000.
For a description of the bits IDMOD0 and IDMOD1
(FM identification mode), FILTBW0 and FILTBW1
(demodulator filter bandwidth) refer to Section 7.3.7.
Bits IDMOD0 and IDMOD1 (FM identification mode),
FILTBW0 and FILTBW1 (demodulator filter bandwidth) are
identical in registers 255 and 9.
Table 67 Easy standard programming register (subaddress 255)
Table 68 Available standards for easy standard programming
76543210
FILTBW1
FILTBW0
IDMOD1
IDMOD0
EPB3
EPB2
EPB1
EPB0
EPB3
EPB2
EPB1
EPB0
STANDARD
NUMBER
NAME
0
A2, B/G
0
1
A2, M (Korea)
0
1
0
2
A2, D/K (1)
0
1
3
A2, D/K (2)
0
1
0
4
A2, D/K (3)
0
1
0
1
5
NICAM, I
0
1
0
6
NICAM, B/G
0
1
7
NICAM, D/K
1
0
8
NICAM, L
1
0
1
9
reserved
1
0
1
0
10
reserved
1
0
1
11
reserved
1
0
12
Astra satellite stereo
(7.02/7.20 MHz)
1
0
1
13
reserved
1
0
14
reserved
1
15
reserved
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