Rev. 2.0, 11/00, page 795 of 1037
28.15
Sync Signal Detector
28.15.1
Overview
This block performs detection of the horizontal sync signal (Hsync) and vertical sync signal
(Vsync) from the composite sync signal (Csync), noise counting, and field detection.
It detects the horizontal and vertical sync signals by setting threshold in the register and based on
the servo clock (
φ
s = fosc/2). Noise masking is possible during the detection of the horizontal
sync signals, and if any Hsync is missing, it can be supplemented. Also, if total volume of the
noise detected in one frame of Csync amounted over a specified volume, the detector generates a
noise detection interrupt.
Note:
This circuit detects a pulse with a specific width set by the threshold register. It does not
classify or restore the sync signal to a formal one.
Summary of Contents for Hitachi H8S/2191
Page 123: ...Rev 2 0 11 00 page 96 of 1037...
Page 149: ...Rev 2 0 11 00 page 122 of 1037...
Page 197: ...Rev 2 0 11 00 page 170 of 1037...
Page 247: ...Rev 2 0 11 00 page 220 of 1037...
Page 249: ...Rev 2 0 11 00 page 222 of 1037...
Page 347: ...Rev 2 0 11 00 page 320 of 1037...
Page 357: ...Rev 2 0 11 00 page 330 of 1037...
Page 417: ...Rev 2 0 11 00 page 390 of 1037...
Page 431: ...Rev 2 0 11 00 page 404 of 1037...
Page 439: ...Rev 2 0 11 00 page 412 of 1037...
Page 457: ...Rev 2 0 11 00 page 430 of 1037...
Page 525: ...Rev 2 0 11 00 page 498 of 1037...
Page 543: ...Rev 2 0 11 00 page 516 of 1037...
Page 845: ...Rev 2 0 11 00 page 818 of 1037...