Rev. 1.0, 02/00, page 577 of 1141
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 26.10 Generation of the Reference Signal when in REC (V Dropped Out)