参数资料
型号: HB28B192C8
元件分类: PROM
英文描述: 96M X 16 FLASH 3.3V PROM CARD, 250 ns, XMA50
封装: CARD-50
文件页数: 7/66页
文件大小: 199K
代理商: HB28B192C8
HB28B512/448/320/256/192/128/064C8
15
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
-CE2
-CE1
A0 to A2
-IORD
-IOWR
D8 to D15
D0 to D7
Invalid mode
L
×××
High-Z
Standby mode
H
×××
High-Z
Data register access
H
L0LH
odd byte
even byte
Alternate status access
L
H
6H
L
H
High-Z
status out
Other task file access
H
L
1-7H
L
H
High-Z
data
Note:
×: L or H
True IDE Mode Write I/O Function
Mode
-CE2
-CE1
A0 to A2
-IORD
-IOWR
D8 to D15
D0 to D7
Invalid mode
L
×××
don’t care
Standby mode
H
×××
don’t care
Data register access
H
L
0
H
L
odd byte
even byte
Control register access
L
H
6H
H
L
don’t care
control in
Other task file access
H
L
1-7H
H
L
don’t care
data
Note:
×: L or H
True IDE Mode I/O Access Timing Example
Dout
A0 to A2
-CE
-IORD
-IOWR
-IOIS16
D0 to D15
read cycle
write cycle
Din
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