Renesas Hitachi H8S/2191, Hardware Manual, Page: 396 / 1065

Rev. 2.0, 11/00, page 369 of 1037
Bit 2: Output Comparing Flag B (OCFB)
This is a status flag indicating the fact that the FRC and the OCRB have come to a comparing
match.
This flag should be cleared by use of the software. Such setting should only be made by use of
the hardware. It is not possible to make this setting using a software.
Bit 2
OCFB Description
0 [Clearing conditions] (Initial value)
When 0 is written into the OCFB after reading the OCFB under the setting of OCFB
= 1
1 [Setting conditions]
When the FRC and the OCRB have come to the comparing match
Bit 1: Time Over Flow (OVF)
This is a status flag indicating the fact that the FRC overflowed. (H'FFFF
→
H'0000).
This flag should be cleared by use of the software. Such setting should only be made by use of
the hardware. It is not possible to make this setting using a software.
Bit 1
OVF Description
0 [Clearing conditions] (Initial value)
When 0 is written into the OVF after reading the OVF under the setting of OVF = 1
1 [Setting conditions]
When the FRC value has become H'FFFF
→
H'0000
Bit 0: Counter Clearing (CCLRA)
This bit works to select if or not to clear the FRC by occurrence of comparing match A
(matching signal of the FRC and OCRA).
Bit 0
CCLRA Description
0 Prohibits clearing of the FRC by occurrence of comparing match A (Initial value)
1 Permits clearing of the FRC by occurrence of comparing match A