Rev. 2.0, 11/00, page 644 of 1037
Figures 28.16 and 28.17 show REF30 (REF30P) when PB is switched to REC.
Cleared
Cleared
Cleared
Cleared
Cleared
Value set in reference
period register 1 (RFD)
Selected VD
*
(OD/EV=0)
*
When in the field discrimination mode
Counter mask
(Clear signal mask)
Counter
Value set in REF30
counter register (RFC)
REF30
VD (except in PB)
REC(ASM)
PB
Toggle mask
Field signal
REC/PB
REF30P
About 75%
Masking
period
Masking
period
Figure 28.16 Generation of the Reference Signal when PB is Switched to REC (1)
Содержание Hitachi H8S/2191
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