Intel PXA26X Manuale Utente Pagina 492

  • Scaricare
  • Aggiungi ai miei manuali
  • Stampa
  • Pagina
    / 624
  • Indice
  • SEGNALIBRI
  • Valutato. / 5. Basato su recensioni clienti
Vedere la pagina 491
13-30 Intel® PXA26x Processor Family Developer’s Manual
AC97 Controller Unit
13.8.3.14 Modem-In Control Register (MICR)
13.8.3.15 Modem-Out Status Register (MOSR)
Table 13-20. Modem-In Control Register
Physical Address
4050_0108
MICR Register AC97
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
FEIE
Reserved
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bits Name Description
31:4 Reserved
3FEIE
FIFO ERROR INTERRUPT ENABLE (FEIE):
Controls whether a receive FIFO error causes an interrupt.
0 – No interrupt occurs even if bit 4 in the MISR is set
1 – An interrupt occurs if bit 4 in the MISR is set.
2:0 Reserved
Table 13-21. Modem-Out Status Register
Physical Address
4050_0110
MOSR Register AC97
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
FIFOE
Reserved
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bits Name Description
31:5 Reserved
4FIFOE
FIFO ERROR (FIFOE):
0 – No transmit FIFO errors have occurred
1 – A transmit FIFO error occurred. This bit is set if a transmit FIFO underrun occurs. In
this case, the last valid sample is repetitively sent out and the pointers are not
incremented.This could happen due to:
1. No more valid buffer data available for transmits.
2. Buffer data available but DMA controller has excessive bandwidth requirements.
Bit is cleared by writing a 1 to this bit position.
3:0 Reserved
Vedere la pagina 491
1 2 ... 487 488 489 490 491 492 493 494 495 496 497 ... 623 624

Commenti su questo manuale

Nessun commento