STB5701 datasheet(29/35 Pages) STMICROELECTRONICS

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STB5701

Functional description

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Note:

This register holds each start code to be detected.

Note:

The length of the start code is stored in this register. If the start code length is 10 symbol

then 10 has to be written into this register. Writing 0x00 disables the SCD.

Note:

The minimum time of the symbol in terms of pre-scaler ticks is stored in this register. If

any symbol violates the minimum symbol time, the SCD process is re-initialized. If a value

0x10 is written into this register, the symbol min. time is 16 pre-scaler clock periods.

Table 17.

SCD_status register format

SCD_status

0x84

Bit

Bit field

Reset state

Function

Detect

1: Start code detected, UHF in fed to UHF out

1:2

Reserved

Alternative

1: The alternative code was detected

31:4

Reserved

0x00

Table 18.

SCD_code register format

SCD_code

0x88

R/W

Bit

Bit field

Reset state

Function

15:0

Code

0x00

Start code to be detected

31:16

Alt_code

0x00

Alternative start code to be detected

Table 19.

SCD_code_lenth register format

SCD_code_lenth

0x8C

R/W

Bit

Bit field

Reset

state

Function

4:0

Code_length

Length of the start code

15:5

Reserved

0x00

20:16

Alt_code_length

Length of the alternative start code

31:21

Reserved

0x00

Table 20.

SCD_symbol_min_time register format

SCD_symbol_min_time

0x90

R/W

Bit

Bit field

Reset state

Function

15:0

Min_time

0x00

Minimum symbol time

31:16

Reserved

0x00

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