參數(shù)資料
型號: SAA5355
廠商: NXP SEMICONDUCTORS
元件分類: 顯示控制器
英文描述: Single-chip colour CRT controller FTFROM
中文描述: 40 X 80 CHARACTERS CRT CHAR DSPL CTLR, PDIP40
文件頁數(shù): 29/31頁
文件大?。?/td> 335K
代理商: SAA5355
March 1986
29
Philips Semiconductors
Product specification
Single-chip colour CRT controller
(FTFROM)
SAA5355
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
a horizontal reference is fed back to the SAA5230 from the SAND output and a vertical reference is generated
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.
Fig.26 Phase-locked slave (indirect sync) mode.
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