Cirrus Logic EP93xx User Manual
Page 781
DS785UM1
27-11
Copyright 2007 Cirrus Logic
IDE Interface
EP93xx User’s Guide
2
7
2
7
27
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
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
WST
MODE
UDMA
MDMA
PIO
IDEEN