ST75C540 datasheet(39/84 Pages) STMICROELECTRONICS

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TDRC

Tone Detector Read Coefficient

TDRC

Opcode:

000

11010

Synopsis

TDRC Read one Coefficient of the selected Tone Detector Cell.

Parameters

Field

Byte

Pos.

Value

Definition

TD_CELL

4..0

0..13

Tone detector cell number

TD_C_ADDR

7..0

0..B

(1)

Biquad coefficient

Energy coefficient

Static level

Energy coefficient for relative comparison

Gain for relative comparison

The command answer is : Low Byte of Coefficient followed by High Byte of Coefficient.

Note 1 :

Value 30 and 40 of byte 2 are available only for secondary tone detector.

TDRW

Tone Detector Read Wiring

TDRW

Opcode:

000

11011

Synopsis

TDRW Read Wiring of the selected Tone Detector Cell.

Parameters

Field

Byte

Pos.

Value

Definition

TD_CELL

4..0

0..13

Tone detector cell number

For primary tone detector

TD_W_ADDR

Other

Biquad and energy input

Comparator inputs

Reserved

The command answer is :

a) If TD_W_ADDR = 0 :

- First Byte is the Node Number of the Signal connected to Biquadratic Filter input.

- Second Byte is the Node Number of the Signal connected to the Energy estimator input.

b) if TD_W_ADDR = 1 :

- First Byte is the Node Number of the Signal connected to Comparator Negative input.

- Second Byte is the Node Number of the Signal connectedto the Comparator Positive input.

For secondary tone detector TD_W_ADDR is not defined.

- First byte is 00 if relative comparison is not mandatory,

First byte is 01 if relative comparison is mandatory.

- Second byte is for the configuration of the secondary tone detector :

C0 configuration 1+1 of secondary tone detectors,

E0 configuration 1+1+2,

F0 configuration 1+1+1.

VII - COMMAND SET DESCRIPTION (continued)

ST75C530 - ST75C540

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ST75C540 数据表(PDF) 39 Page - STMicroelectronics

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