NXP Semiconductors freescale K51 Series Reference Manual

I2Sx_FCSR field descriptions (continued)Field Description1001 TFE set when there are more than or equal to 9 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 6 data.1010 TFE set when there are more than or equal to 10 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 5 data.1011 TFE set when there are more than or equal to 11 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 4 data.1100 TFE set when there are more than or equal to 12 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 3 data.1101 TFE set when there are more than or equal to 13 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 2 data.1110 TFE set when there are more than or equal to 14 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 1 data.1000 TFE set when there are more than or equal to 15 empty slots in Transmit FIFO. (default) TransmitFIFO empty is set when TxFIFO ≤ 0 data.50.3.13 I2S AC97 Control Register (I2Sx_ACNT)Addresses: I2S0_ACNT is 4002_F000h base + 38h offset = 4002_F038hBit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16R 0WReset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0R 0FRDIV WR RD TIF FVAC97ENWReset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0I2Sx_ACNT field descriptionsField Description31–11ReservedThis read-only field is reserved and always has the value zero.10–5FRDIVFrame Rate Divider.These bits control the frequency of AC97 data transmission/reception. They are programmed with thenumber of frames for which the I2S should be idle, after operating in one frame. Through these bits, AC97frequency of operation, from 48 KHz (000000) to 1 KHz (101111) can be achieved.Sample Value: 001010 (10 Decimal) = I2S will operate once every 11 frames4WRWrite Command.Table continues on the next page...Memory map/register definitionK51 Sub-Family Reference Manual, Rev. 6, Nov 20111448 Freescale Semiconductor, Inc.