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(d) Interrupt request
IRRDRM1 is generated by the NCDFG signal latch and the overflow of the error detection
counter. IRRDRM2 is generated by detection of lock (after the detection of the number of
times of setting).
–value+value
Specified speed value
Latch data 0
(no error)
Preset value
Preset period
(2 counts)
Counter
NCDFG signal
Error data latch
signal (DFG )
Preset data
load
Figure 28.28 Example of the Operation of the Drum Speed Error Detection
(Selection of the Rising Edge of DFG)
Summary of Contents for Hitachi H8S/2191
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