HD6417727BP160CV Datasheet, PDF (459/1098 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/ SH7700 Series

Section 14 Direct Memory Access Controller (DMAC)
from CMT, a transmit request (TDREQ) and a receive request (RDREQ) from SIOR, and a
transmit request (DREQN1) and a receive request (DREQN0) from USBF. TDREQ, RDREQ,
DREQN1, and DREQN0 are supported for expansion.
When the DMA transfer is enabled (DE = 1, DME = 1, TE = 0, and NMIF = 0) in this mode, a
transfer is started by the transfer request signal input. The source of the transfer request does not
have to be the data transfer source or destination.
When RXI2 is set as a transfer request, however, the transfer source must be the SCIF's receive
data register (RDR2). Likewise, when TXI2 is set as a transfer request, the transfer source must be
the SCIF's transmit data register (TDR2). In addition, when the transfer requester is the A/D
converter, the data transfer source must be the A/D data register (ADDR).
Table 14.4 Selection of On-Chip Module Request Modes Using RS3 to RS0 Bits
DMA Transfer Request DMA Transfer
RS3 RS2 RS1 RS0 Source
Request Signal
Source Destination Bus Mode
1 0 0 0 Expansion USBF
receiver
DREQN[0]
(DMA transfer
request output)
EPDR1 Arbitrary* Cycle steal
USBF
transmitter
DREQN[1]
(DMA transfer
request output)
Arbitrary* EPDR2
Cycle steal
SIOF
receiver
RDREQ
(receive-data
transfer request)
SIRDR Arbitrary*
Cycle steal
SIOF
transmitter
TDRQ
(transmit-data
transfer request)
Arbitrary* SITDR
Cycle steal
1 0 0 SCIF transmitter
TXI2
Arbitrary* TDR2
(SCIF transmit data
empty interrupt)
Cycle steal
0 1 SCIF receiver
RXI2
RDR2
(SCIF receive data
full interrupt)
Arbitrary*
Cycle steal
1 0 A/D converter
ADI
(A/D conversion
end interrupt)
ADDR Arbitrary* Cycle steal
1 1 CMT
CMI
(Compare-match
timer interrupt)
Arbitrary* Arbitrary*
Burst/
cycle steal
Note: * External memory, memory-mapped external device, on-chip supporting module (excluding
DMAC, BSC, UBC)
Rev.6.00 Mar. 27, 2009 Page 401 of 1036
REJ09B0254-0600