471
Bit
Initial value
Read/Write
7
EDIE
0
R/(W)
6
IRF
0
R/(W)
*
5
TCEIE
0
R/W
4
SDIR
0
R/W
3
DTSIZE
0
R/W
2
BGUP
0
R/W
1
—
0
R/W
0
—
0
R/W
Bus Give-Up
0
Bus is not released in burst
mode or block transfer mode
1
In burst mode or block transfer
mode, the bus is transferred if
requested by an internal bus
master
Data Transmit Size
0
Byte-size (8-bit) specification
1
Word-size (16-bit) specification
Single Address Direction
0
Transfer direction: EDSAR
→
external device with DACK
1
Transfer direction: External device with DACK
→
EDDAR
Transfer Counter End Interrupt Enable
0
Transfer end interrupt requests by transfer counter are disabled
1
Transfer end interrupt requests by transfer counter are enabled
EXDMA Interrupt Enable
0
Interrupt request is not generated
1
Interrupt request is generated
Interrupt Request Flag
0
No interrupt request source
[Clearing conditions]
• Writing 1 to the EDA bit in EDMDR
• Writing 0 to IRF after reading IRF = 1
1
Interrupt request source occurrence
[Setting conditions]
• Transfer end interrupt request generated by transfer counter
• Source address repeat area overflow interrupt request
• Destination address repeat area overflow interrupt request
Note:
*
Bit IRF can only be written with 0 after being read as 1, to clear the flag.
Содержание H8S/2670
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