HD64570 Datasheet, PDF (315/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

6.4.5 DMAC Characteristics
Tables 6.10 and 6.11 list the DMAC characteristics in different modes.
Table 6.10 DMAC Characteristics in CPU Modes 0, 2, and 3*¹
Mode
Single-block
transfer mode
Chained-block
transfer mode
Transfer Direction
Memory to MSCI
MSCI to memory
Memory to MSCI
(transmission)
MSCI to memory
(reception)
DMA Transfer Rate DMA Transfer DMAC Buffer
(states/word)
Set-Up Time*² Switching Time
3
—
—
3
—
—
3
20*³
21/25*⁴
3
18*⁵
26*⁶
Rev. 0, 07/98, page 299 of 453