h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 407

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

Bit 3—VFBACKI Edge (VFEDG): Detects a rising edge on the VFBACKI pin.
Bit 2—Pre-Equalization Flag (PREQF): Detects the occurrence of an IHI signal 2fH
modification condition. The generation of a falling/rising edge in the IHI signal during a mask
interval is expressed as the occurrence of a 2fH modification condition. For details, see section
13.3.4, IHI Signal and 2fH Modification.
Bit 1—IHI Signal Level (IHI): Indicates the current level of the IHI signal. Signal source and
phase inversion selection for the IHI signal depends on the contents of TCONRI. Read this bit to
determine whether the input signal is positive or negative, then maintain the IHI signal at positive
phase by modifying TCONRI.
Bit 3
VFEDG
0
1
Bit 2
PREQF
0
1
Bit 1
IHI
0
1
Description
[Clearing condition]
When 0 is written in VFEDG after reading VFEDG = 1
[Setting condition]
When a rising edge is detected on the VFBACKI pin
Description
[Clearing condition]
When 0 is written in PREQF after reading PREQF = 1
[Setting condition]
When an IHI signal 2fH modification condition is detected
Description
The IHI signal is low
The IHI signal is high
Section 13 Timer Connection [H8S/2138 Group]
Rev. 4.00 Jun 06, 2006 page 353 of 1004
REJ09B0301-0400
(Initial value)
(Initial value)