Freescale Semiconductor MPC5200B ユーザーズマニュアル

Freescale Semiconductor

15-57

The next support mode is the I2S mode. The I2S transmission is similar to the “Soft Modem” mode. Therefore the configuration is the same 
like described in 

The different is, that during the I2S word 

transmission the FrameSync signal (LRCK) is stable for the complete data word and is the opposite for the next one. To enable the I2S mode 
the 

[I2S] bit must be set. The 

[SyncPol] bit define if the frame starts with a low LRCK signal or with a high LRCK signal. If the 

transmitter detect the start condition he starts to send the data from the TxFIFO. If the receiver detects an start condition, he starts to write the 
data from the RX line to the RxFIFO. The FIFO doesn’t provide the ability to mark the data in the FIFO, therefore only the order in the FIFO 
define if the data was receive/transmit during high or low phase of the LRCK. 

Figure 15-12 

shows the I2S transmission diagram.

0x0A

Disable the Tx and Rx part for configuration if the PSC was enabled by the work 
before.

0x07100000

Select the 24bit Codec mode, msb first, DTS1 = 0, slave mode

0x000C

set the RFALARM level to 0x00C

TFALARM

0x0010

set the TFALARM level to 0x010

0x0100

enable TxRDY interrupt

Port_Config

0x00000066

Select the Pin-Muxing for PSC1,PSC2 Codec mode, see 

0x05

Enable Tx and Rx

0x0A

Disable the Tx and Rx part for configuration if the PSC was enabled by the work 
before.

0x07980000

Select the 24bit Codec mode, msb first, DTS1 = 0, master mode, cell phone 
master

0x01170000

select the BitClk and Frame frequency

0x00

select the FrameSync width, default value

0x000C

set the RFALARM level to 0x00C

TFALARM

0x0010

set the TFALARM level to 0x010

0x0100

enable TxRDY interrupt

Port_Config

0x00000066

Select the Pin-Muxing for PSC12, PSC2 Codec mode, see 

0x05

Enable Tx and Rx