SH7641 Datasheet, PDF (441/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

Section 12 Bus State Controller (BSC)
Table 12.20 Minimum Number of Idle Cycles during DMAC Single Address Mode Transfer
to the Normal Space Interface from the External Device with DACK
(1) Transfer from the external device with DACK to the normal space interface
BSC Register Setting*³
CSnWCR.WM
Setting
CMNCR.DMAIWA CMNCR.DMAIW
Setting
Idle Setting
1
0

0
0

1
1
0
0
1
0
1
1
1
0
1
1
1
1
2
0
1
2
1
1
4
0
1
4
0, 1
1
n (n≥6)
When Access Size is
Less than Bus Width
Continuous
Transfer*¹
Non-Continuous
Transfer*²
0
2
1
2
0
2
1
2
1
2
1
2
2
2
2
2
4
4
4
4
n
n
Rev. 4.00 Sep. 14, 2005 Page 391 of 982
REJ09B0023-0400