Cirrus-logic EP93xx Manuale Utente Pagina 788

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27-18 DS785UM1
Copyright 2007 Cirrus Logic
IDE Interface
EP93xx User’s Guide
2
7
2
7
27
IDEUDMADebug
Address:
0x800A_002C - Read/Write
Default:
0x0000_0000
Definition:
Debug register to reset some internal signals in the UDMA state machine for
debug purpose.
Bit Descriptions:
RSVD: Reserved. Unknown during read, ignored during writes.
RWOE: Reset UDMA write data-out error.
RWPTR: Reset UDMA write buffer pointer to 0.
RWDR: Reset UDMA write DMA request.
RROE: Reset UDMA read data-in error.
RRPTR: Reset UDMA read buffer pointer to 0.
RRDR: Reset UDMA read DMA request.
IDEUDMAWrBufSts
Address:
0x800A_0030 - Read Only
Default:
0x0000_0100
Definition:
Status register for UDMA write buffer.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RSVD
1514131211109876543210
RSVD RRDR RRPTR RROE RWDR RWPTR RWOE
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
CRC
1514131211109876543210
RSVD FULL NFULL HOM EMPTY TPTR HPTR
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