r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 430

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 EXDMA Controller (EXDMAC)
Rev. 1.00 Sep. 19, 2008 Page 400 of 1342
REJ09B0467-0100
Bit
6
5
4
Bit Name
IRF
TCEIE
SDIR
0
0
0
Initial Value
R/W
R/(W) *
R/W
R/W
Description
Interrupt Request Flag
Flag indicating that an interrupt request has
occurred and transfer has ended.
0: No interrupt request
[Clearing conditions]
•
•
1: Interrupt request occurrence
[Setting conditions]
•
•
•
Transfer Counter End Interrupt Enable
Enables or disables transfer end interrupt requests
by the transfer counter. When transfer ends
according to the transfer counter while this bit is set
to 1, the IRF bit is set to 1, indicating that an
interrupt request has occurred.
0: Transfer end interrupt requests by transfer
1: Transfer end interrupt requests by transfer
Single Address Direction
Specifies the data transfer direction in single
address mode. In dual address mode, the
specification by this bit is ignored.
0: Transfer direction: EDSAR → external device
1: Transfer direction: External device with DACK→
counter are disabled
counter are enabled
with DACK
EDDAR
transfer counter
request
interrupt request
Writing 1 to the EDA bit
Writing 0 to IRF after reading IRF = 1
Transfer end interrupt request generated by
Source address repeat area overflow interrupt
Destination address repeat area overflow