HB2881000A5 Datasheet, PDF (15/66 Pages) Hitachi Semiconductor – FLASH ATA Card 1 GByte

HB2881000A5
3. True IDE Mode
The card can be configured in a True IDE mode of operation. This card is configured in this mode only when the -OE
input signal is asserted GND by the host. In this True IDE mode Attribute Registers are not accessible from the host.
Only I/O operation to the task file and data register are allowed. If this card is configured during power on
sequence, data register are accessed in word (16-bit). The card permits 8-bit accesses if the user issues a Set
Feature Command to put the device in 8-bit mode.
True IDE Mode Read I/O Function
Mode
Invalid mode
Standby mode
Data register access
Alternate status access
Other task file access
Note: ×: L or H
-CE2
L
H
H
L
H
-CE1
L
H
L
H
L
A0 to A2 -IORD
×
×
×
×
0
L
6H
L
1-7H
L
-IOWR
×
×
H
H
H
D8 to D15 D0 to D7
High-Z High-Z
High-Z High-Z
odd byte even byte
High-Z status out
High-Z data
True IDE Mode Write I/O Function
Mode
Invalid mode
Standby mode
Data register access
Control register access
Other task file access
Note: ×: L or H
-CE2
L
H
H
L
H
-CE1
L
H
L
H
L
A0 to A2 -IORD
×
×
×
×
0
H
6H
H
1-7H
H
-IOWR
×
×
L
L
L
D8 to D15 D0 to D7
don’t care don’t care
don’t care don’t care
odd byte even byte
don’t care control in
don’t care data
True IDE Mode I/O Access Timing Example
A0 to A2
-CE
-IORD
-IOWR
-IOIS16
D0 to D15
Dout
read cycle
Din
write cycle
15