3069RF-ZTAT Datasheet, PDF (226/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Bit 6—Data Transfer Size (DTSZ): Selects the data size of each transfer.
Bit 6
DTSZ
0
1
Description
Byte-size transfer
Word-size transfer
(Initial value)
Bit 5—Data Transfer Increment/Decrement (DTID): Selects whether to increment or
decrement the memory address register (MAR) after a data transfer in I/O mode or repeat mode.
Bit 5
DTID
0
1
Description
MAR is incremented after each data transfer
• If DTSZ = 0, MAR is incremented by 1 after each transfer
• If DTSZ = 1, MAR is incremented by 2 after each transfer
MAR is decremented after each data transfer
• If DTSZ = 0, MAR is decremented by 1 after each transfer
• If DTSZ = 1, MAR is decremented by 2 after each transfer
(Initial value)
MAR is not incremented or decremented in idle mode.
Bit 4—Repeat Enable (RPE): Selects whether to transfer data in I/O mode, idle mode, or repeat
mode.
Bit 4
RPE
0
1
Bit 3
DTIE
0
1
0
1
Description
I/O mode
Repeat mode
Idle mode
(Initial value)
Operations in these modes are described in sections 7.4.2, I/O Mode, 7.4.3, Idle Mode, and 7.4.4,
Repeat Mode.
Rev. 5.0, 09/04, page 204 of 978