TB1305FG, TB1308FG

2007-07-11

10

Register Name

Function

VD-POL

Polarity detection to VD-IN

0: Positive

1: Negative

Detects the width from the VD-IN pin to determine whether it is negative or not. When the High level of

the input VD-IN is wider than approx 4.5 ms, VD-POL shows 1.

H FORMAT

Horizontal format detection

0000: 15.625/15.75kHz 0001: 28.125kHz

0010: 31.25/31.5kHz

0011: 33.75kHz

0100: 37.5/37.9kHz

0101: 45/48kHz

0110: 64kHz/67.5kHz

0111: 75kHz

1000 56.25kHz

1001 ~ 1111: Undefined

Detects a horizontal format (horizontal frequency).

NOTE1: Format detection errors such as the following can occur when suppressed syncs are input. See

NOTE3 in the function description on Automatic sync processing mode, too.

525i input → 525p detected, 625i input → 625p detected, 1125i input → 1125p detected

525p/625p input → No V-sync detected

NOTE2: When 525i, 625i, 1125/50i or 1125/60i signal is input, H FORMAT data can be incorrect caused

by the pseudo-syncs for copy guard or the equalizing pulses.

V FORMAT

Vertical format detection

00: 50 Hz

01: 60 Hz

10 ~ 11: Undefined

Detects a vertical format (horizontal frequency) according to V FREQ DET data.

H FM2

Horizontal format detection 2

0: Known

1: Unknown

Detects whether an input is in one of the defined formats or not. This is based on H FORMAT data.

NOTE: H FM2 may indicate Unknown, when 525p input with pseudo sync signal for copy guard is input.

V FM2

Vertical format detection 2

0: Known

1: Unknown

Detects whether an input is in one of the defined formats or not. This is based on V FORMAT data.

H IN

Input detection to horizontal syncs

0: No signal

1: Signal

V IN

Input detection to vertical syncs

0: No signal

1: Signal

V-SYNC-W

V-SYNC width detection

0: Wide

1: Narrow

Detects V-SYNC width for detecting 1250i format.

Under A-SYNC = 1 (ON), V-SYNC-W shows 1, when the VD width from the VD-IN pin is narrower than

approx 69

µs, or when the V-SYNC width from the SYNC-IN pin is narrower than approx 27 µs.

VERSION

IC version identification

00: TB1305FG

01: TB1308FG

10: ----

11: ----

V FREQ DET

Counts the vertical frequency of an input selected by SYNC SW.

0000000: Over 3.5kHz

1001111: 44Hz or less

1010000～1111111: No signal

How to calculate a vertical frequency (Y):

Convert data read from V FREQ DET into decimal value and call it X.

Vertical frequency (Y)

The error range of X is

−1 to +1.

H FREQ DET

Counts the horizontal frequency of an input selected by SYNC SW.

00000000: No signal

11111111: Over 85kHz

How to calculate a horizontal frequency (Y):

Convert data read from H FREQ DET into decimal value and call it X.

Horizontal frequency (Y)

= 1 ÷ (0.003 ÷ X) [Hz]

The error range of X is

−1 to +1.