Renesas Hitachi H8S/2191, Hardware Manual, Page: 787 / 1065

Rev. 2.0, 11/00, page 760 of 1037
Bit 3: Bit Pattern Detection ON/OFF Bit (BPON)
Determines ON or OFF of bit pattern detection.
Note: When writing 1 to the BPON bit, be sure to set appropriate data to RCDR2 to RCDR5
beforehand.
Bit 3
BPON Description
0 Bit pattern detection OFF (Initial value)
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 (Initial value)
1 Starts 8-bit bit pattern detection
Bit 1: Bit Pattern Detection Flag (BPF)
Sets the flag every time 8-bit PB-CTL is detected in PB or ASM mode. To clear the flag, write
0 after reading 1.
Bit 1
BPF Description
0 Bit pattern (8-bit) is not detected (Initial value)
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 or rewrite, and ASM record.