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ST75C520 数据表(PDF) 25 Page - STMicroelectronics

部件名 ST75C520
功能描述  HIGH SPEED FAX MODEM DATA PUMP
PDF  45 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST75C520 数据表(HTML) 25 Page - STMicroelectronics

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TDWC
Tone Detector Write Coefficient
TDWC
Opcode:
1C
00011100
Synopsis
TDWC Write one Coefficient of the selected Tone Detector Cell.
Parameters
Field
Byte
Pos.
Value
Definition
TD_CELL
1
3..0
0..F
Tone detector cell number
TD_C_ADDR
2
7..0
0..B
10
20
Other
Biquad coefficient
Energy coefficient
Static level
Reserved
TD_COEFL
3
7..0
Low byte of coefficient
TD_COEFH
4
7..0
High byte of coefficient
TDWW
Tone Detector Write Wiring
TDWW
Opcode:
1D
00011101
Synopsis
TDRC Write Wiring of the selected Tone Detector Cell.
Parameters
Field
Byte
Pos.
Value
Definition
TD_CELL
1
3..0
0..F
Tone detector cell number
TD_W_ADDR
2
0
0
1
Other
Biquad and energy input
Comparator inputs
Reserved
If TD_W_ADDR = 0 (Select Biquad and Energy Inputs)
Parameters
Field
Byte
Pos.
Value
Definition
TD_W_ERN
3
0..3F
Energy estimator signal input
TD_W_BIQ
4
0..3F
Biquad filter signal input
If TD_W_ADDR = 1 (Select Comparator Inputs)
Parameters
Field
Byte
Pos.
Value
Definition
TD_W_CN
3
0..3F
Negative comparator signal input
TD_W_CP
4
0..3F
Positive comparator signal input
TDZ
Tone Detector Clear Cell
TDZ
Opcode:
1E
00011110
Synopsis
TDZ Clears all internal variables of one Tone detector cell including Filter local variables
and energy estimator. This command must be sent after changing coefficients of a cell to
avoid instability.
Parameters
Field
Byte
Pos.
Value
Definition
TD_CELL
1
3..0
0..F
Tone detector cell number
ST75C520
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