參數(shù)資料
型號: TDA9870A
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: Digital TV Sound Processor DTVSP
中文描述: SPECIALTY CONSUMER CIRCUIT, PDIP64
封裝: SHRINK, PLASTIC, DIP
文件頁數(shù): 77/88頁
文件大小: 362K
代理商: TDA9870A
1998 Aug 10
77
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9870A
When the SIF AGC is off, this register returns the contents
of the AGC gain register.
10.4.7.2
Definition
Table 96
Subaddress 7
10.4.8
T
EST REGISTER
3
10.4.8.1
Description
This register contains, as a binary number, the highest
memory address used for the Coefficient RAM (CRAM,
expert mode).
10.4.8.2
Definition
Table 97
Subaddress 251
10.4.9
T
EST REGISTER
2
10.4.9.1
Description
This register contains, as a binary number, the highest
subaddress used for slave receiver registers.
10.4.9.2
Definition
Table 98
Subaddress 252
10.4.10 T
EST REGISTER
1
10.4.10.1 Description
This register contains, as a binary number, the highest
subaddress used for slave transmitter (status) registers.
10.4.10.2 Definition
Table 99
Subaddress 253
MSB
LSB
B7
B6
B5
B4
B3
B2
B1
B0
MSB
LSB
B7
0
B6
1
B5
1
B4
1
B3
1
B2
1
B1
1
B0
1
MSB
LSB
B7
0
B6
0
B5
1
B4
0
B3
1
B2
1
B1
0
B0
1
MSB
LSB
B7
0
B6
0
B5
0
B4
0
B3
0
B2
1
B1
1
B0
1
10.4.11 D
EVICE IDENTIFICATION CODE
10.4.11.1 Description
There will be several devices in the digital TV sound
processor family. This byte is used to identify the individual
family members.
10.4.11.2 Definition
Table 100
Subaddress 254
10.4.12 S
OFTWARE IDENTIFICATION CODE
10.4.12.1 Description
It is likely that during the life time of this family of devices
several versions of the DSP software will be made, e.g., to
accommodate new application concepts, respond to
customer wishes, etc. This byte is used to identify the
different releases.
10.4.12.2 Definition
Table 101
Subaddress 255
10.5
Expert mode
In addition to the slave receiver and slave transmitter
modes previously described, there is a special ‘expert’
mode that gives direct write access to the internal CRAM
of the DSP.
In this mode, transferred data contain 12-bit-wide
coefficients. As those coefficients bypass on-chip
coefficient look-up tables for many functions, they directly
influence the processing of signals within the DSP.
This mode must be used with great care. It can be used to
create user-defined characteristics, such as a tone control
with different corner frequencies or special boost/cut
characteristics to correct the low-frequency loudspeaker
and/or cabinet frequency responses.
MSB
LSB
B7
0
B6
0
B5
1
B4
0
B3
0
B2
0
B1
1
B0
0
MSB
LSB
B7
0
B6
0
B5
0
B4
0
B3
0
B2
0
B1
1
B0
0
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