Renesas Hitachi H8S/2194 Series Hardware Manual page 819

Figures 28.68 and 28.69 show examples of CFG mask timer operations.
CFG (racing)
Edge detect
Capstan motor
mask timer
DVCFG
MCGin flag
Figure 28.68 CFG Mask Timer Operation (When Capstan Motor is Racing)
CFG
Edge detect
Capstan motor
mask timer
Figure 28.69 CFG Mask Timer Operation (When Capstan Motor is Operating Normally)
Rev. 2.0, 11/00, page 792 of 1037
Mask interval
Mask interval
Mask interval
Cleared by writing 0
after reading 1
Mask interval