Hitachi H8S/2199 Hardware Manual page 704

Bit 3    Bit Pattern Detection ON/OFF Bit (BPON): Determines ON or OFF of bit pattern
detection.
Note: When writing 1 to BPON bit, be sure to set appropriate data to RCDR 2 to 5 beforehand.
Bit 3
BPON Description
0 Bit pattern detection off
1 Bit pattern detection on
Bit 2    Bit Pattern Detection Start Bit (BPS): Starts 8-bit bit pattern detection. When 1 is
written to this bit, it returns to 0 after one cycle. Writing 0 to this bit does not affect operation.
Bit 2
BPS Description
0 Normal status
1 Starts 8-bit bit pattern detection
Bit 1    Bit Pattern Detection Flag (BPF): Sets flag every time 8-bit PB-CTL is detected in PB or
ASM mode. To clear flag, write 0 after reading 1.
Bit 1
BPF Description
0 Bit pattern (8-bit) is not detected
1 Bit pattern (8-bit) is detected
Bit 0    Duty I/O Register (DI/O): This flag has different functions for record and playback.
In VISS detect mode, VASS detect mode, and ASM mark detect mode, this flag indicates the
detection result.
In VISS record or rewrite mode, this flag controls the write control circuit so as to write an index
code, operating according to a control signal from the VISS control circuit.
In VASS record or rewrite mode and ASM mark record mode, this flag is used for write control,
one CTL pulse at a time.
This bit can always be written to, but this does not affect the write control circuit in modes other
than VISS record, rewrite, and ASM record.
Rev. 1.0, 02/00, page 698 of 1141
(Initial value)
(Initial value)
(Initial value)