Samsung S3C2451X User Manual page 210

DMA CONTROLLER
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.
Bit Source
0 SPI_0_TX
1 SPI_0_RX
2 SPI_1_TX
3 SPI_1_RX
4 I2S TX
5 I2S RX
6 I2S1 TX
7 I2S1 RX
Here, nXDREQ0 and nXDREQ1 represent two external sources (External Devices).
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
9-2
Specifications and information herein are subject to change without notice.
Table 9-1. DMA request sources for each channel
Bit Source
8 Reserved
9 PWM Timer
10 Reserved
11 Reserved
12 PCM0 TX
13 PCM0 RX
14 PCM1 TX
15 PCM1 RX
S3C2451X RISC MICROPROCESSOR
Bit Source
16 Reserved
17 nXDREQ0
18 nXDREQ1
19 UART_0[0]
20 UART_0[1]
21 UART_1[0]
22 UART_1[1]
23 UART_2[0]
Bit Source
24 UART_2[1]
25 UART_3[0]
26 UART_3[1]
27 PCMOUT
28 PCMIN
29 MICIN
30 Reserved
31 Reserved