ADV7344BSTZ datasheet(63/88 Pages) AD

63 / 88 page

ADV7344

Rev. 0 | Page 63 of 88

EXTERNAL HORIZONTAL AND VERTICAL SYNCHRONIZATION CONTROL

For synchronization purposes, the ADV7344 is able to accept either time codes embedded in the input pixel data or external

synchronization signals provided on the S_HSYNC, S_VSYNC, P_HSYNC, P_VSYNC, and P_BLANK pins (see Table 49). It is also

possible to output synchronization signals on the S_HSYNC and S_VSYNC pins (see Table 50 to Table 52).

Table 49. Timing Synchronization Signal Input Options

Signal

Condition

SD HSYNC In

S_HSYNC

SD Slave Timing Mode 1, 2, or 3 selected (Subaddress 0x8A[2:0]).1

SD VSYNC In

S_VSYNC

SD Slave Timing Mode 1, 2, or 3 selected (Subaddress 0x8A[2:0]).1

ED/HD HSYNC In

P_HSYNC

ED/HD Timing Sync. Inputs enabled (Subaddress 0x30, Bit 2 = 0).

ED/HD VSYNC In

P_VSYNC

ED/HD Timing Sync. Inputs enabled (Subaddress 0x30, Bit 2 = 0).

ED/HD BLANK In

P_BLANK

1 SD and ED/HD timing sync. Outputs must also be disabled (Subaddress 0x02[7:6] = 00).

Table 50. Timing Synchronization Signal Output Options

Signal

Condition

SD HSYNC Out

S_HSYNC

SD Timing Sync. Outputs enabled (Subaddress 0x02, Bit 6 = 1).1

SD VSYNC Out

S_VSYNC

SD Timing Sync. Outputs enabled (Subaddress 0x02, Bit 6 = 1).1

ED/HD HSYNC Out

S_HSYNC

ED/HD Timing Sync. Outputs enabled (Subaddress 0x02, Bit 7 = 1).

ED/HD VSYNC Out

S_VSYNC

ED/HD Timing Sync. Outputs enabled (Subaddress 0x02, Bit 7 = 1).

1 ED/HD timing sync. Outputs must also be disabled (Subaddress 0x02, Bit 7 = 0).

Table 51. HSYNC Output Control1

ED/HD Input Sync

Format (0x30, Bit 2)

ED/HD HSYNC

Control

(0x34, Bit 1)

ED/HD Sync

Output Enable

(0x02, Bit 7)

SD Sync

Output Enable

(0x02, Bit 6)

Signal on S_HSYNC Pin

Duration

Tristate.

–

Pipelined SD HSYNC.

See Appendix 5—SD Timing.

Pipelined ED/HD HSYNC.

As per HSYNC timing.

Pipelined ED/HD HSYNC

based on AV Code H bit.

Same as line blanking interval.

Pipelined ED/HD HSYNC

based on horizontal counter.

Same as embedded HSYNC.

1 In all ED/HD standards where there is an HSYNC output, the start of the HSYNC pulse is aligned with the falling edge of the embedded HSYNC in the output video.

Table 52. VSYNC Output Control1

ED/HD Input

Sync Format

(0x30, Bit 2)

ED/HD VSYNC

Control

(0x34, Bit 2)

ED/HD Sync

Output Enable

(0x02, Bit 7)

SD Sync

Output Enable

(0x02, Bit 6)

Video Standard

Signal on S_VSYNC Pin

Duration

Tristate.

–

Interlaced

Pipelined SD VSYNC/Field.

See Appendix 5—

SD Timing.

Pipelined ED/HD VSYNC

or field signal.

As per VSYNC or

field signal timing.

All HD interlaced

standards

Pipelined field signal

based on AV Code F bit.

Field.

All ED/HD progressive

standards

Pipelined VSYNC based on

AV Code V bit.

Vertical blanking

interval.

All ED/HD standards

except 525p

Pipelined ED/HD VSYNC

based on vertical counter.

Aligned with

serration lines.

525p

Pipelined ED/HD VSYNC

based on vertical counter.

Vertical blanking

interval.

1 In all ED/HD standards where there is a VSYNC output, the start of the VSYNC pulse is aligned with the falling edge of the embedded VSYNC in the output video.

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