tmpr4937 TOSHIBA Semiconductor CORPORATION, tmpr4937 Datasheet - Page 160

• Manufacturer Part Number: tmpr4937
• Description: 64-bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Controller
8.3
DMAC0
DMAC1
DMA
8.3.1
Detailed Explanation
Memory-Memory Copy
Memory-Memory Copy
Transfer Mode
below). The setting of the External Request bit (DMCCRn.EXTRQ) of the DMA Channel Control
Register selects whether transfer with an I/O device is a DMA transfer.
•
•
Internal I/O (ACLC)
Transfer Mode
Internal I/O (SIO)
The DMA Controller (DMAC0, DMAC1) supports five transfer mode types (refer to Table 8.3.1
(Single Address)
(Dual Address)
External I/O
External I/O
Fill Memory
Fill Memory
I/O DMA Transfer Mode (DMCCRn.EXTRQ = “1”)
Perform DMA transfer with either an external device connected to the External Bus Controller or
an on-chip I/O device (ACLC or SIO).
Memory Transfer Mode (DMCCRn.EXTRQ = “0”)
Either copies data between memory devices or fills data in memory.
Table 8.3.1 DMA Controller Transfer Modes
DMCCRn
EXTREQ
1
1
1
0
0
1
0
0
DMASEL
PCFG
8-4
⎯
⎯
⎯
⎯
⎯
0
0
1
DMCCRn
SNGAD
Chapter 8 DMA Controller
1
0
0
0
1
0
0
1
DMSAR
√
√
√
√
√
√
√
√
DMDAR
⎯
⎯
⎯
√
√
√
√
√
Ref.
8.3.3
8.3.7
8.3.3
8.3.8
8.3.4
8.3.8
8.3.4
8.3.8
8.3.6
8.3.7
8.3.4
8.3.8
8.3.4
8.3.8
8.3.6
8.3.7