
SiI0680A PCI to IDE/ATA 
Data Sheet
9.7.36
IDE0 UDMA Timing 
Address Offset: AC
H 
Access Type: Read/Write 
Reset Value: 0x4009_4009 
Silicon Image, Inc. 
 2006 Silicon Image, Inc.  
SiI-DS-0069-C
92 
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
D
D
D
D
D
H
R
Device 1 Cycle Time 
Count 
D
D
D
D
D
H
R
Device 0 Cycle Time 
Count 
This register defines the UDMA timing register for IDE Channel #0 in the SiI 0680A. See chapter 11 for details on 
programming this timing register. The register bits are defined below. 
Bit [31:30]
:  Device 1 Data Input Delay (R/W) – IDE0 Device 1 Data Input Delay for UDMA Mode.  This bit field is 
used for programming the data input delay in increments of 2 nsec in UDMA mode.   
Bit [29:28]
:  Device 1 DSTROBE Delay (R/W) – IDE0 Device 1 DSTROBE Delay for UDMA Mode.  This bit field 
is used for programming the DSTROBE output delay in increments of 2 nsec in UDMA mode.   
Bit [27:25]
:  Device 1 HSTROBE Delay (R/W) – IDE0 Device 1 HSTROBE Delay for UDMA Mode.  This bit field 
is used for programming the HSTROBE output delay in increments of 2 nsec in UDMA mode.   
Bit [24:23]
:  Reserved (R).  This bit field is reserved and returns zeros on a read. 
Bit [22]
:  Reserved (R/W) – This bit field is reserved.  
Bit [21:16]
:  Device 1 Cycle Time Count (R/W) – IDE0 Device 1 UDMA Cycle Time Count.  This bit field is used 
for programming the UDMA Active and Recovery Time.   
Bit [15:14]
:  Device 0 Data Input Delay (R/W) – IDE0 Device 0 Data Input Delay for UDMA Mode.  This bit field is 
used for programming the data input delay in increments of 2 nsec in UDMA mode.   
Bit [13:12]
:  Device 0 DSTROBE Delay (R/W) – IDE0 Device 0 DSTROBE Delay for UDMA Mode.  This bit field 
is used for programming the DSTROBE output delay in increments of 2 nsec in UDMA mode 
Bit [11:09]
:  Device 0 HSTROBE Delay (R/W) – IDE0 Device 0 HSTROBE Delay for UDMA Mode.  This bit field 
is used for programming the HSTROBE output delay in increments of 2 nsec in UDMA mode.   
Bit [08:07]
:  Reserved (R).  This bit field is reserved and returns zeros on a read. 
Bit [06]
:  Reserved (R/W) – This bit field is reserved. 
Bit [05:00]
:  Device 0 Cycle Time Count (R/W) – IDE0 Device 0 UDMA Cycle Time Count.  This bit field is used 
for programming the UDMA Active and Recovery Time