h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 333

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Timing is described in section 11.3, Operation.
Bit 7—Input Capture Flag A (ICFA): This status flag indicates that the FRC value has been
transferred to ICRA by means of an input capture signal. When BUFEA = 1, ICFA indicates that
the old ICRA value has been moved into ICRC and the new FRC value has been transferred to
ICRA.
ICFA must be cleared by software. It is set by hardware, however, and cannot be set by software.
Bit 6—Input Capture Flag B (ICFB): This status flag indicates that the FRC value has been
transferred to ICRB by means of an input capture signal. When BUFEB = 1, ICFB indicates that
the old ICRB value has been moved into ICRD and the new FRC value has been transferred to
ICRB.
ICFB must be cleared by software. It is set by hardware, however, and cannot be set by software.
Bit 5—Input Capture Flag C (ICFC): This status flag indicates that the FRC value has been
transferred to ICRC by means of an input capture signal. When BUFEA = 1, on occurrence of the
signal transition in FTIC (input capture signal) specified by the IEDGC bit, ICFC is set but data is
not transferred to ICRC. Therefore, in buffer operation, ICFC can be used as an external interrupt
signal (by setting the ICICE bit to 1).
ICFC must be cleared by software. It is set by hardware, however, and cannot be set by software.
Bit 7
ICFA
0
1
Bit 6
ICFB
0
1
Description
[Clearing condition]
Read ICFA when ICFA = 1, then write 0 in ICFA
[Setting condition]
When an input capture signal causes the FRC value to be transferred to
ICRA
Description
[Clearing condition]
Read ICFB when ICFB = 1, then write 0 in ICFB
[Setting condition]
When an input capture signal causes the FRC value to be transferred to ICRB
Rev. 4.00 Jun 06, 2006 page 279 of 1004
Section 11 16-Bit Free-Running Timer
REJ09B0301-0400
(Initial value)
(Initial value)