tmpr4937 TOSHIBA Semiconductor CORPORATION, tmpr4937 Datasheet - Page 168
tmpr4937
Manufacturer Part Number
tmpr4937
Description
64-bit Tx System Risc
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMPR4937.pdf
(552 pages)
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8.3.8
8.3.8.1
Dual Address Transfer
applies to the following DMA transfer modes.
This section explains the register settings for Dual Address transfer (DMCCRn.SNGAD = 0). This
•
•
•
Channel Register Settings During Dual Address Transfer
these restrictions are not met, then a Configuration Error is detected, the Configuration Error bit
(CFERR) of the DMA Channel Status Register (DMCSRn) is set, and DMA transfer is not
performed.
transfer setting size is 8 bytes or larger, then a value will be set in the DMA Source Address
Register (DMSARn) that reflects as follows.
transfer size is 2 bytes or larger, set the DMA Source Address Register (DMSARn) as follows:
•
•
•
negative and the transfer size is 2 bytes or larger, set the DMA Destination Address Register
(DMDARn) as follows:
•
•
•
•
•
Table 8.3.3 shows restrictions of the Channel Register settings during Dual Address transfer. If
If the setting of the DMA Source Address Increment Register (DMSAIRn) is negative and the
If the setting of the DMA Source Address Increment Register (DMSAIRn) is negative and the
Likewise, if the setting of the DMA Destination Address Increment Register (DMDAIRn) is
External I/O (Dual Address) transfer
Internal I/O DMA transfer
Memory-Memory Copy transfer
If the transfer size is 2 bytes, set the DMSARn with the low-order 1 bit complemented.
If the transfer size is 4 bytes, set the DMSARn with the low-order 2 bits complemented.
If the transfer size is 8 bytes or larger, set the DMSARn with the low-order 3 bits
complemented.
If the transfer size is 2 bytes, set the DMDARn with the low-order 1 bit complemented.
If the transfer size is 4 bytes, set the DMDARn with the low-order 2 bits complemented.
If the transfer size is 8 bytes or larger, set the DMDARn with the low-order 3 bits
complemented.
DMSAIRn setting is “0” or greater: 0x0_0001_0000
DMSAIRn setting is a negative value: 0x0_0001_0007
Example: When the transfer address is 0x0_0001_0000, the DMA Source Address
Register (DMSARn) is as follows below.
8-12
Chapter 8 DMA Controller
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