
DS785UM1 27-11
Copyright 2007 Cirrus Logic
IDE Interface
EP93xx User’s Guide
Bit Descriptions:
RSVD: Reserved. Unknown during read, ignored during write.
CS0n: Chip Select 0 pin output control.
CS1n: Chip Select 1 pin output control.
DA: Device address output control.
DIORn: DIORn pin output control.
DIOWn: DIOWn pin output control.
DASPn: DASPn pin input state. This signal comes in on the
EGPIO[15] pin. Read only.
DMARQ: DMARQ pin input state. This signal comes in on the
EGPIO[2] pin. Read only.
INTRQ: INTRQ pin input state. This input comes from the INT[3]
input pin and is routed to the Interrupt Controller. Read
only.
IORDY: IORDY pin input state. Read only.
IDECfg
Address:
0x800A_0004 - Read/Write
Default:
0x0000_0000
Definition:
IDE Configuration Register.
Bit Descriptions:
RSVD: Reserved. Unknown during read, ignored during write.
IDEEN: IDE master enable.
PIO: Polled IO operation selection.
MDMA: Multiword DMA operation selection.
UDMA: Ultra DMA operation selection.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RSVD
1514131211109876543210
RSVD WST MODE UDMA MDMA PIO IDEEN
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