saa5355 NXP Semiconductors, saa5355 Datasheet - Page 29

• Manufacturer Part Number: saa5355
• Description: Single-chip Colour Crt Controller Ftfrom
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Phase-locked slave
The phase-locked slave (indirect sync) mode is shown in Fig.26. A phase-locked VCO in the SAA5230 teletext video
processor provides sync to the timebases. When FTFROM is active, its horizontal counter forms part of the phase control
loop
by feeding separated composite sync to FTFROM’s field sync separator via the VCS input. In the phase-locked slave
mode, the display derived from FTFROM can sync with that from a tv source or a local VLP player, thus giving
picture-in-text display possibilities.
March 1986
Single-chip colour CRT controller
(FTFROM)
a horizontal reference is fed back to the SAA5230 from the SAND output and a vertical reference is generated
Fig.26 Phase-locked slave (indirect sync) mode.
29
Product specification
SAA5355