Cirrus Logic EP93 Series User Manual page 781

Bit Descriptions:
RSVD:
CS0n:
CS1n:
DA:
DIORn:
DIOWn:
DASPn:
DMARQ:
INTRQ:
IORDY:
IDECfg
31 30 29 28
15 14 13 12
RSVD
Address:
0x800A_0004 - Read/Write
Default:
0x0000_0000
Definition:
IDE Configuration Register.
Bit Descriptions:
RSVD:
IDEEN:
PIO:
MDMA:
UDMA:
DS785UM1
Reserved. Unknown during read, ignored during write.
Chip Select 0 pin output control.
Chip Select 1 pin output control.
Device address output control.
DIORn pin output control.
DIOWn pin output control.
DASPn pin input state. This signal comes in on the
EGPIO[15] pin. Read only.
DMARQ pin input state. This signal comes in on the
EGPIO[2] pin. Read only.
INTRQ pin input state. This input comes from the INT[3]
input pin and is routed to the Interrupt Controller. Read
only.
IORDY pin input state. Read only.
27 26 25 24
RSVD
11 10 9 8
WST
Reserved. Unknown during read, ignored during write.
IDE master enable.
Polled IO operation selection.
Multiword DMA operation selection.
Ultra DMA operation selection.
Copyright 2007 Cirrus Logic
23 22 21 20
7 6 5 4
MODE
IDE Interface
EP93xx User's Guide
19 18 17 16
3 2 1 0
UDMA MDMA PIO IDEEN
27-11
27