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Preliminary
DMA CONTROLLER
S3C2451X RISC MICROPROCESSOR
9-2
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
DMA REQUEST SOURCES
Each channel of DMA controller can select one source among 27 DMA sources if H/W DMA request mode is
selected by REQSEL register. (Note that if S/W request mode is selected, this DMA request sources have no
meaning at all.) The 27 DMA sources for each channel are as follows.
Table 9-1. DMA request sources for each channel
Bit Source Bit
Source
Bit
Source
Bit Source
0 SPI_0_TX 8 Reserved 16
Reserved
24 UART_2[1]
1 SPI_0_RX 9 PWM
Timer 17
nXDREQ0
25 UART_3[0]
2 SPI_1_TX 10
Reserved
18
nXDREQ1
26 UART_3[1]
3 SPI_1_RX 11
Reserved
19
UART_0[0]
27 PCMOUT
4 I2S
TX 12
PCM0 TX
20
UART_0[1]
28 PCMIN
5 I2S
RX 13
PCM0 RX
21
UART_1[0]
29 MICIN
6 I2S1
TX 14
PCM1 TX
22
UART_1[1]
30 Reserved
7 I2S1
RX 15
PCM1 RX
23
UART_2[0]
31 Reserved
Here, nXDREQ0 and nXDREQ1 represent two external sources (External Devices).