Rev. 2.0, 11/00, page 753 of 1037
Bit
ASM
REC
/
3%
3%
FW/
RV
MD4
MD3
MD2
MD1
MD0
Mode
Description
0
0
0/1
0
1
0
0
1
VISS
detect
(index
detect)
•
The duty I/O flag is set to 1 at the
point of write access to register
CTLM
•
The 1 pulses recognized by the
duty discrimination circuit are
counted in the VISS control
circuit
•
The duty I/O flag is cleared to 0,
indicating VISS detection, when
the value set at VCTR register is
repeatedly detected
•
An interrupt request is generated
when VISS is detected
0
1
0
0
0
1
0
1
VISS
record
(index
record)
•
64 pulse data with 0 pulse data at
both edges are written (index
record)
•
The index bit string is written
through the duty I/O flag
•
An interrupt request is generated
at the end of VISS recording
0
0
0
0
0
1
0
1
VISS
rewrite
Same as above (VISS record;
trapezoid waveform circuit
operation)
0
0
0
1
0
0
0
0
VISS
initialize
VISS write is forcibly aborted
1
0
0/1
0
0
0
0
0
ASM
mark
detect
ASM mark detection
•
The duty I/O flag is cleared to 0
when PB-CTL duty
≥
66% is
detected
•
An interrupt request is generated
when an ASM mark is detected
0
1
0
1
0
0
0
0
ASM
mark
record
•
An ASM mark is recorded by
writing 0 in the duty I/O flag
•
An interrupt is requested for
every one CTL pulse
•
REC-CTL is generated and
recorded with the duty cycle set
by register RCDR3
Summary of Contents for Hitachi H8S/2191
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