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PCM AUDIO INTERFACE
S3C2416X RISC MICROPROCESSOR
25-6
3.4 PCM CONTROL REGISTER
The PCM_CTL register is used to control the various aspects of the PCM module. It also provides a status bit to
provide the option to using polling instead of interrupt based control.
Register
Address
R/W
Description
Reset Value
PCM_CTL 0x5C000000
R/W
Control
the PCM Audio Interface
0x00000000
The bit definitions for the PCM_CTL Control Register are shown below:
PCM_CTL
Bit
Description
Initial State
Reserved [31:19] Reserved
TXFIFO_DIPSTICK [18:13] Determines
when
the almost_full, almost_empty flags go
active for the TXFIFO
TXFIFO_ALMOST_EMPTY: txfifo_depth < txfifo_dipstick
TXFIFO_ALMOST_FULL: txfifo_depth > (32 –
txfifo_dipstick)
Note:
- If txfifo_dipstick is 0, Almost_empty, Almost_full are invalid
- For DMA loading of TX fifo, Txfifo_dipstick should be equal to 2
or greater than 2(txfifo_dipstick >= 2)
This is required since the PCM_TXDMA uses
TXFIFO_ALMOST_FULL as the DMA request (keep requesting data
until the FIFO is almost full) In some circumstances, the DMA write
one more word after the DMA_req goes away. Thus the almost_full
flag most go active with at least space for one extra word in the fifo
0
RXFIFO_DIPSTICK [12:7]
Determines
when
the almost_full, almost_empty flags go
active for the RXFIFO
RXFIFO_ALMOST_EMPTY : fifo_depth < fifo_dipstick
RXFIFO_ALMOST_FULL : fifo_depth > (32 – fifo_dipstick)
Note:
- If fifo_dipstick is 0, Almost_empty, Almost_full are invalid.
- For DMA, RXFIFO_DIPSTICK is a don’t care.
(DMA unloading of RX fifo uses the RXFIFO_EMPTY flag as the
DMA request)
- Non-DMA IRQ/polling RXFIFO_DIPSTICK should be 32.
This will have the effect of RXFIFO_ALMOST_FULL acting as a
rx_fifo_not_empty flag (as a not RXFIFO_EMPTY).
0
PCM_TX_DMA_EN
[6]
Enable the DMA interface for the TXFIFO DMA must operate
in the demand mode.
DMA_TX request will occur whenever the TXFIFO is not
almost full
0
PCM_RX_DMA_EN
[5]
Enable the DMA interface for the RXFIFO DMA must operate
in the demand mode.
DMA_RX request will occur whenever the RXFIFO is not
empty.
0
Содержание S3C2416
Страница 33: ...S3C2416X RISC MICROPROCESSOR PRODUCT OVERVIEW 1 5 3 BLOCK DIAGRAM Figure 1 1 S3C2416X Block Diagram ...
Страница 38: ...PRODUCT OVERVIEW S3C2416X RISC MICROPROCESSOR 1 10 153 AIN 1 U14 195 EINT 10 GPG2 K15 237 SDATA 14 C18 ...
Страница 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Страница 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Страница 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Страница 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Страница 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Страница 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Страница 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Страница 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Страница 455: ...S3C2416X RISC MICROPROCESSOR HSMMC CONTROLLER 20 9 4 9 SD COMMAND ISSUE SEQUENCE Figure 20 9 Timeout Setting Sequence ...
Страница 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Страница 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Страница 653: ...S3C2416X RISC MICROPROCESSOR ELECTRICAL DATA 26 15 Figure 26 14 SDRAM READ WRITE Timing Trp 2 Trcd 2 Tcl 2 DW 16 bit ...
Страница 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...
Страница 672: ...MECHANICAL DATA S3C2416X RISC MICROPROCESSOR 30 2 Figure 27 2 330 FBGA 1414 Package Dimension 2 Bottom View ...