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Rev. 2.0, 11/00, page 638 of 1037
Sampling
Cleared
Cleared
Cleared
Drop-out of V
Value set in reference
period register 1 (RFD)
Selected VD
(OD/EV=0)
Counter mask
(clear signal mask)
Counter
Value set in REF30
counter register (RFC)
REF30
VD
Toggle mask
Field signal
REF30P
HSW
Drum phase counter
Sampling
T
Sampling
About 75%
About 75%
About 75%
About 75%
About
25%
Masking
period
Masking
period
Figure 28.10 Generation of Reference Signal in Record Mode (V Dropped Out)
Содержание Hitachi H8S/2191
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Страница 639: ...Rev 2 0 11 00 page 612 of 1037 28 1 2 Block Diagram Figure 28 1 shows a block diagram of the servo circuits...
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