PCM_CFG

Bit Field

Read/Write

Field Name

Description

25

RW

TX_ACK_SEL

Select which TX word acknowleges the TX request

24

RW

RX_ACK_SEL

Select which RX word acknowleges the RX request

23

RW

TX_DMA_ENABLE

Enable/disable the TX DMA request

22

RW

RX_DMA_ENABLE

Enable/disable the RX DMA request

21

RW

TX_IOC_ENABLE

Enable/disable the TX IOC request

20

RW

RX_IOC_ENABLE

Enable/disable the RX IOC request

19

RW

RX_TX_INT_ENABLE

Enable/disable the RX_TX interrupt

17

RW

OVERRUN_INT_EN

Enable/disable the overrun interrupt

16

RW

UNDERRUN_INT_EN

Enable/disable the underrun interrupt

15

RW

CLK_POLARITY

Select the PCM clock polarity

14

RW

TX_DATA_ALIGN

Select the TX data alignment

13

RW

RX_DATA_ALIGN

Select the RX data alignment

12:8

RW

WORD_SIZE

Select the number of bits per PCM word

7

RW

BIT_ORDER

Select whether the data is transmitted starting with the MSB or LSB

6

RW

FRAME_ALIGN

Align the PCM frame signal to the first/last bit

5

RW

FRAME_WIDTH

Use a long/short PCM frame signal

4:2

RW

FRAME_LENGTH

Select the number of words per PCM frame

1

RW

SUBFRAME

Enable the frame duration for each word

0

RW

SLAVE

Use the PCM interface as a master/slave

Bit Field

Field Name

Value Symbol

Value Description

Hex Value

25

TX_ACK_SEL

PCM_TX_ACK_DATA0

TX data0 acknowledges the TX request

0x0*

PCM_TX_ACK_DATA1

TX data1 acknowledges the TX request

0x1

24

RX_ACK_SEL

PCM_RX_ACK_DATA0

RX data0 acknowledges the RX request

0x0*

PCM_RX_ACK_DATA1

RX data1 acknowledges the RX request

0x1

23

TX_DMA_ENABLE

PCM_TX_DMA_DISABLE

No TX DMA request is generated

0x0*

PCM_TX_DMA_ENABLE

A TX DMA request is generated when new data is requested by the PCM interface

0x1

22

RX_DMA_ENABLE

PCM_RX_DMA_DISABLE

No RX DMA request is generated

0x0*

PCM_RX_DMA_ENABLE

An RX DMA request is generated when new data is received by the PCM interface

0x1

21

TX_IOC_ENABLE

PCM_TX_IOC_DISABLE

No TX IOC request is generated

0x0*

PCM_TX_IOC_ENABLE

A TX IOC request is generated when new data is requested by the PCM interface

0x1

20

RX_IOC_ENABLE

PCM_RX_IOC_DISABLE

No RX IOC request is generated

0x0*

PCM_RX_IOC_ENABLE

An RX IOC request is generated when new data is received by the PCM interface

0x1

19

RX_TX_INT_ENABLE

PCM_RX_TX_INT_DISABLE

No RX_TX interrupt is raised

0x0*

PCM_RX_TX_INT_ENABLE

An RX_TX interrupt is raised when new data is received or requested by the PCM interface

0x1

17

OVERRUN_INT_EN

PCM_OVERRUN_INT_DISABLE

No ERROR interrupt is raised when an overrun is detected

0x0*

PCM_OVERRUN_INT_ENABLE

An ERROR interrupt is raised when an overrun occurs on the PCM interface

0x1

16

UNDERRUN_INT_EN

PCM_UNDERRUN_INT_DISABLE

No ERROR interrupt is raised when an underrun is detected

0x0*

PCM_UNDERRUN_INT_ENABLE

An ERROR interrupt is raised when an underrun occurs on the PCM interface

0x1

15

CLK_POLARITY

PCM_SAMPLE_FALLING_EDGE

PCM input data sampled on PCM_CLK falling edge

0x0*

PCM_SAMPLE_RISING_EDGE

PCM input data sampled on PCM_CLK rising edge

0x1

14

TX_DATA_ALIGN

PCM_TX_DATA_ALIGN_MSB

TX data is aligned on the MSB of the 32-bit TX buffer

0x0*

PCM_TX_DATA_ALIGN_LSB

TX data is aligned on the LSB of the 32-bit TX buffer

0x1

13

RX_DATA_ALIGN

PCM_RX_DATA_ALIGN_MSB

RX data is aligned on the MSB of the 32-bit RX buffer

0x0*

PCM_RX_DATA_ALIGN_LSB

RX data is aligned on the LSB of the 32-bit RX buffer

0x1

12:8

WORD_SIZE

PCM_WORD_SIZE_8

Use 8-bit words

0x0

PCM_WORD_SIZE_9

Use 9-bit words

0x1

PCM_WORD_SIZE_10

Use 10-bit words

0x2

PCM_WORD_SIZE_11

Use 11-bit words

0x3

PCM_WORD_SIZE_12

Use 12-bit words

0x4

PCM_WORD_SIZE_13

Use 13-bit words

0x5

PCM_WORD_SIZE_14

Use 14-bit words

0x6

PCM_WORD_SIZE_15

Use 15-bit words

0x7

PCM_WORD_SIZE_16

Use 16-bit words

0x8*

PCM_WORD_SIZE_17

Use 17-bit words

0x9

PCM_WORD_SIZE_18

Use 18-bit words

0xA

PCM_WORD_SIZE_19

Use 19-bit words

0xB

PCM_WORD_SIZE_20

Use 20-bit words

0xC

PCM_WORD_SIZE_21

Use 21-bit words

0xD

PCM_WORD_SIZE_22

Use 22-bit words

0xE

PCM_WORD_SIZE_23

Use 23-bit words

0xF

PCM_WORD_SIZE_24

Use 24-bit words

0x10

PCM_WORD_SIZE_25

Use 25-bit words

0x11

PCM_WORD_SIZE_26

Use 26-bit words

0x12

PCM_WORD_SIZE_27

Use 27-bit words

0x13

PCM_WORD_SIZE_28

Use 28-bit words

0x14

PCM_WORD_SIZE_29

Use 29-bit words

0x15

PCM_WORD_SIZE_30

Use 30-bit words

0x16

PCM_WORD_SIZE_31

Use 31-bit words

0x17

PCM_WORD_SIZE_32

Use 32-bit words

0x18

7

BIT_ORDER

PCM_BIT_ORDER_MSB_FIRST

PCM data is ordered from MSB to LSB.

0x0*

PCM_BIT_ORDER_LSB_FIRST

PCM data is ordered from LSB to MSB.

0x1

6

FRAME_ALIGN

PCM_FRAME_ALIGN_LAST

Align the PCM frame signal to the last bit of the frame.

0x0*

PCM_FRAME_ALIGN_FIRST

Align the PCM frame signal to the first bit of the frame.

0x1

5

FRAME_WIDTH

PCM_FRAME_WIDTH_SHORT

The frame is high for one PCM clock period.

0x0*

PCM_FRAME_WIDTH_LONG

The frame is high for half of the frame length.

0x1

4:2

FRAME_LENGTH

PCM_MULTIWORD_2

A frame contains 2 words.

0x0*

PCM_MULTIWORD_4

A frame contains 4 words.

0x1

PCM_MULTIWORD_6

A frame contains 6 words.

0x2

PCM_MULTIWORD_8

A frame contains 8 words.

0x3

PCM_MULTIWORD_10

A frame contains 10 words.

0x4

PCM_MULTIWORD_12

A frame contains 12 words.

0x5

PCM_MULTIWORD_14

A frame contains 14 words.

0x6

PCM_MULTIWORD_16

A frame contains 16 words.

0x7

1

SUBFRAME

PCM_SUBFRAME_DISABLE

Generate a frame signal every frame.

0x0*

PCM_SUBFRAME_ENABLE

Generate a frame signal every word.

0x1

0

SLAVE

PCM_SELECT_MASTER

The PCM interface generates the PCM_FRAME.

0x0

PCM_SELECT_SLAVE

The PCM interface received an external PCM_FRAME.

0x1*