Silicon Image SiliconDrive SSD-P16G(I)-3100 - Manual (Page 53)

ATA AND T RUE IDE R EGISTER D ECODING SSD-P XXX (I)-3100 D ATA S HEET
S ILICON S YSTEMS P ROPRIETARY
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3100P-06DSR P AGE 43 F EBRUARY 2, 2009
ATA
AND
T
RUE
IDE R
EGISTER
D
ECODING
SiliconDrive can be configured as either a a memory-mapped or an an I/O
devices. As noted earlier, communication to and from the drive is
accomplished using the ATA Command Block.
M
EMORY
-M
APPED
R
EGISTER
D
ECODING
In memory-mapped mode, the SiliconDrive registers are accessed via
standard memory references (i.e., OE# and WE#). The ATA registers are
mapped to common memory space in a 2KB window starting at address 0.
Table 30: Memory-Mapped Register Decoding
Reg# Offset A10 A9:A4 A3 A2 A1 A0 OE# = L WE# = L
1 0 0 X 0 0 0 0 Even Data
Read Even Data
Write
1 1 0 X 0 0 0 1 Error Feature
1 2 0 X 0 0 1 0 Sector Count Sector Count
1 3 0 X 0 0 1 1 Sector
Number Sector
Number
1 4 0 X 0 1 0 0 Cylinder Low Cylinder Low
1 5 0 X 0 1 0 1 Cylinder High Cylinder High
1 6 0 X 0 1 1 0 Drive/Head Drive/Head
1 7 0 X 0 1 1 1 Status Command
1 8 0 X 1 0 0 0 Duplicate
Even Data
Read Duplicate
Even Data
Write
1 9 0 X 1 0 0 1 Duplicate Odd
Data Read Duplicate Odd
Data Write
1 D 0 X 1 1 0 1 Duplicate
Error Duplicate
Feature
1 E 0 X 1 1 1 0 Alternate
Status Device Control
1 F 0 X 1 1 1 1 Drive Address Reserved
1 X 1 X X X X 0 Even Data
Read Even Data
Write
1 X 1 X X X X 1 Odd Data
Read Odd Data
Write