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Clocks Per Line Status

HSYNC Width

VSYNC Width

Line Length Tolerance

Reserved

TVP7002

SLES206 – MAY 2007

Subaddress

39h–3Ah

Read only

Subaddress

7

6

5

4

3

2

1

0

39h

Clocks per Line [7:0]

3Ah

Reserved

Clocks per Line [11:8]

Clocks per Line [11:0]: Number of clock cycles per line. The value written to this register represents the length of the longest line per frame.

A known timing reference based on either the internal clock reference (~6.3 MHz) or an external clock reference input (EXT_CLK) of up to

27 MHz may be selected using subaddress 1Ah.

Note: The Clocks per Line counter is not dependent on the H-PLL being locked.

Subaddress

3Bh

Read only

7

6

5

4

3

2

1

0

HSYNC width [7:0]

HSYNC width [7:0]: Number of clock cycles between the leading and trailing edges of the HSYNC input. A known timing reference based on

either the internal clock reference (~6.3 MHz) or an external clock reference input (EXT_CLK) of up to 27 MHz may be selected using

subaddress 1Ah.

Note: The HSYNC width counter is not dependent on the H-PLL being locked.

Subaddress

3Ch

Read only

7

6

5

4

3

2

1

0

Reserved

VSYNC width [4:0]

VSYNC width [4:0]: Number of lines between the leading and trailing edges of the VSYNC input. The VSYNC width along with the HSYNC

and VSYNC polarities can be used to determine whether the input graphics format is using VESA-CVT generated timings.

Note: The VSYNC width counter is not dependent on the H-PLL being locked.

Subaddress

3Dh

Default (03h)

7

6

5

4

3

2

1

0

Reserved

Line length tolerance [6:0]

Line length tolerance [6:0]: Controls sensitivity to HSYNC input stability when using either the internal or external clock reference. Increasing

the line length tolerance may be required for input signals having horizontal instability. Effects the clock cycles per line counter (see

subaddresses 39h–3Ah)

00h = No tolerance (minimum)

03h = 3 line length tolerance (default)

7Fh = 127 line length tolerance (maximum)

Subaddress

3Eh

Default (04h)

7

6

5

4

3

2

1

0

Reserved [7:0]

Reserved [7:0]:

04h = Required setting (default)

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