r5s72060w200fpv Renesas Electronics Corporation., r5s72060w200fpv Datasheet - Page 412
r5s72060w200fpv
Manufacturer Part Number
r5s72060w200fpv
Description
32-bit Risc Microcomputer Superhtm Risc Engine Family / Sh7200 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5S72060W200FPV.pdf
(1180 pages)
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Section 9 Direct Memory Access Controller (DMAC)
Table 9.6
When DREQ is accepted, the DREQ pin enters the request accept disabled state (non-sensitive
period). After issuing acknowledge DACK signal for the accepted DREQ, the DREQ pin again
enters the request accept enabled state.
When DREQ is used by level detection, there are following two cases by the timing to detect the
next DREQ after outputting DACK.
Overrun 0: Transfer is terminated after the same number of transfer has been performed as
requests.
Overrun 1: Transfer is terminated after transfers have been performed for (the number of requests
plus 1) times.
The DO bit in CHCR selects this overrun 0 or overrun 1.
Table 9.7
Rev. 2.00 Dec. 09, 2005 Page 388 of 1152
REJ09B0191-0200
DL bit
0
1
CHCR
DO bit
0
1
CHCR
Selecting External Request Detection with DL and DS Bits
Selecting External Request Detection with DO Bit
DS bit
0
1
0
1
Detection of External Request
Low level detection
Falling edge detection
High level detection
Rising edge detection
External Request
Overrun 0
Overrun 1
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