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: 5/66页
文件大小: 199K
代理商: HB28B192C8
HB28B512/448/320/256/192/128/064C8
13
2.
Task File register access specifications
There are two cases of Task File register mapping, one is mapped I/O address area, the other is mapped
Memory address area. Each case of Task File register read and write operations are executed under the
condition as follows. That area can be accessed by Byte/Word/Odd Byte mode which are defined by PC card
standard specifications.
(1)
I/O address map
Task File Register Read Access Mode (1)
Mode
-REG
-CE2
-CE1
A0
-IORD -IOWR -OE
-WE
D8 to D15 D0 to D7
Standby mode
×
HH
×
××××
High-Z
Byte access (8-bit)
L
H
L
H
High-Z
even byte
L
H
L
H
L
H
High-Z
odd byte
Word access (16-bit)
L
×
L
H
odd byte
even byte
Odd byte access (8-bit)
L
H
×
L
H
odd byte
High-Z
Note:
×: L or H
Task File Register Write Access Mode (1)
Mode
-REG
-CE2
-CE1
A0
-IORD -IOWR -OE
-WE
D8 to D15 D0 to D7
Standby mode
×
HH
×
××××
Don’t care Don’t care
Byte access (8-bit)
L
H
L
H
L
H
Don’t care even byte
L
H
L
H
L
H
Don’t care odd byte
Word access (16-bit)
L
×
H
L
H
odd byte
even byte
Odd byte access (8-bit)
L
H
×
H
L
H
odd byte
Don’t care
Note:
×: L or H
Task File Register Access Timing Example (1)
Dout
A0 to A10
-REG
-CE2/-CE1
-IORD
- IOWR
D0 to D15
read cycle
write cycle
Din
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