UM10237_2 © NXP B.V. 2008. All rights reserved.
User manual Rev. 02 — 19 December 2008 616 o f 792
NXP Semiconductors UM10237
Chapter 23: LPC24XX I2S interface
5.6 DMA Configuration Register 1 (I2SDMA1 - 0xE008 8014)

The I2SDMA1 register controls the operation of DMA request 1. The function of bits in

I2SDMA1 are shown in Table23–537. Refer to the General Purpose DMA Controller

chapter for details of DMA operation.

5.7 DMA Configuration Register 2 (I2SDMA2 - 0xE008 8018)

The I2SDMA2 register controls the operation of DMA request 2. The function of bits in

I2SDMA2 are shown in Table23–532.

5.8 Interrupt Request Control Register (I2SIRQ - 0xE008 801C)

The I2SIRQ register controls the operation of the I2S interrupt request. The function of bits

in I2SIRQ are shown in Table23–532.

15:8 rx_level Reflects the current level of the Receive FIFO. 0
23:16 tx_level Reflects the current level of the Transmit FIFO. 0
31:24 - Reserved, user software should not write ones to reserved bits. The
value read from a reserved bit is not defined. NA
Table 536: Status Feedback register (I2SSTATE - address 0xE008 8010) bit description
Bit Symbol Description Reset
Value
Table 537: DMA Configuration register 1 (I2SDMA1 - address 0xE008 8014) bit description
Bit Symbol Description Reset
Value
0 rx_dma1_enable When 1, enables DMA1 for I2S receive. 0
1 tx_dma1_enable When 1, enables DMA1 for I2S transmit. 0
7:2 Unused Unused. 0
15:8 rx_depth_dma1 Set the FIFO l evel that triggers a receive DMA request on
DMA1. 0
23:16 tx_depth_dma1 Set the FIFO l evel that triggers a transmit DMA request on
DMA1. 0
31:24 - Reserved, user software should not write ones to reserved
bits. The value read from a reserved bit is not defined. NA
Table 538: DMA Configuration register 2 (I2SDMA2 - address 0xE008 8018) bit description
Bit Symbol Description Reset
Value
0 rx_dma2_enable When 1, enables DMA1 for I2S receive. 0
1 tx_dma2_enable When 1, enables DMA1 for I2S transmit. 0
7:2 Unused Unused. 0
15:8 rx_depth_dma2 Set the FIFO level that triggers a receive DMA request
on DMA2. 0
23:16 tx_depth_dma2 Set the FIFO level that triggers a transmit DMA request
on DMA2. 0
31:24 - Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is not
defined.
NA