s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 338

• Manufacturer Part Number: s3c4510b
• Description: 16/32-bit Risc Microcontroller
• Manufacturer: Samsung Semiconductor, Inc.

DMA CONTROLLER
GDMA SPECIAL REGISTERS
GDMA CONTROL REGISTERS
9-2
GDMACON0
GDMACON1
GDMASRC0
GDMADST0
GDMASRC1
GDMADST1
GDMACNT0
GDMACNT1
GDMACON0
GDMACON1
Bit Number
Registers
Registers
[3:2]
[0]
[1]
[4]
[5]
Run enable/disable
Busy status
GDMA mode selection
Destination address
direction
Source address direction This bit controls whether the source address will be decremented
0xB00C
0xC00C
0xB000
0xC000
0xB004
0xB008
0xC004
0xC008
0xB000
0xC000
Offset
Offset
Bit Name
Table 9-2. GDMACON0 and GDMACON1 Registers
Table 9-3. GDMA Control Register Description
Table 9-1. GDMA Special Registers Overview
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Setting this bit to "1", starts a DMA operation. To stop DMA, you
must clear this bit to "0". You can use the GMA run bit control
address (GDMACON offset address + 0x20) to manipulate this bit.
By using the run bit control address, other GDMA control register
values are not affected.
When DMA starts, this read-only status bit is automatically set to
"1". When it is "0", DMA is idle.
Four sources can initiate a DMA operation: 1) software (memory-
to-memory), 2) an external DMA request (nXDREQ), 3) the UART0
block, and 4) the UART1 block. The mode selection setting
determines which source can initiate a DMA operation at any given
time.
This bit controls whether the destination address will be
decremented ("1") or incremented ("0") during a DMA operation.
("1") or incremented ("0") during a DMA operation.
GDMA controller channel 0 control register
GDMA controller channel 1 control register
GDMA channel 0 source address register
GDMA channel 0 destination address register
GDMA channel 1 source address register
GDMA channel 1 destination address register
GDMA channel 0 transfer count register
GDMA channel 1 transfer count register
GDMA controller channel 0 control register
GDMA controller channel 1 control register
Description
Description
Reset Value
Reset Value
Reset Value
0 00000000
0 00000000
0 00000000
0 00000000
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
S3C4510B