VS6724 datasheet(67/118 Pages) STMICROELECTRONICS

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VS6724

Programming model and register description

67/118

Power management

Video timing parameter host inputs

Video timing parameter FP inputs (read only)

Table 18.

Power management

Index

PowerManagement(1)

0x0580

bTimeToPowerdown

Default value

0x0f

Purpose

Time (mSecs) from entering Pause mode until the system automatically

transitions stop mode. 0xff disables the automatic transition.

Type

BYTE

Must be configured in STOP mode

Table 19.

Video timing parameter host inputs

Index

VideoTimingParameterHostInputs(1)

0x0605(MSByte)

0x0606(LSByte)

uwExternalClockFrequencyNumerator

Default value

0x0c

Purpose

The External Clock Frequency configuration must match the frequency

supplied to the CLK pin;

External clock frequency = uwExternalClockFrequencyDenumerator/

bExternalClockFrequencyDenominator

Type

UINT16

Possible values

The External clock frequency range is 6 to 27, this represents 6MHz to

27 MHz

0x0608

bExternalClockFrequencyDenominator

Default value

0x01

Type

BYTE

Should be configured in the RAW state

Table 20.

Video timing parameter FP inputs (read only)

Index

VideoTimingParameterFPInputs (read only)(1)

0x0605(MSByte)

0x0606(LSByte)

uwExternalClockFrequencyMhzNumerator

Purpose

Allows the host to read back the uwExternalClockFrequency

Type

FLOAT

Can be read in all operating modes

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