參數(shù)資料
型號: SST48CF048-C1
元件分類: PROM
英文描述: 24M X 16 FLASH 3.3V PROM CARD, 100 ns, XMA50
封裝: CARD-50
文件頁數(shù): 20/62頁
文件大?。?/td> 1077K
代理商: SST48CF048-C1
Data Sheet
CompactFlash Card
SST48CF008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192 / 256
27
2002 Silicon Storage Technology, Inc.
S71125-03-000
2/02
375
2.5 I/O Transfer Function
2.5.1 I/O Function
The I/O transfer to or from the CompactFlash card can be either 8 or 16 bits. When a 16-bit accessible port is
addressed, the signal -IOIS16 is asserted by the CompactFlash card. Otherwise, the -IOIS16 signal is de-asserted.
When a 16 bit transfer is attempted, and the -IOIS16 signal is not asserted by the CompactFlash card, the system
must generate a pair of 8-bit references to access the word’s Even Byte and Odd Byte. The CompactFlash card
permits both 8 and 16 bit accesses to all of its I/O addresses, so -IOIS16 is asserted for all addresses to which the
CompactFlash card responds.
TABLE
2-16: I/O FUNCTION
Function Code
-REG
-CE2
-CE1
A0
-IORD
-IOWR
D15-D8
D7-D0
Standby mode
X
VIH
X
High Z
Byte Input Access (8 bits)
VIL
VIH
VIL
VIH
High Z
Even Byte
VIL
VIH
VIL
VIH
VIL
VIH
High Z
Odd Byte
Byte Output Access (8 bits)
VIL
VIH
VIL
VIH
VIL
Don’t Care
Even Byte
VIL
VIH
VIL
VIH
VIL
Don’t Care
Odd Byte
Word Input Access (16 bits)
VIL
VIH
Odd Byte
Even Byte
Word Output Access (16 bits)
VIL
VIH
VIL
Odd Byte
Even Byte
I/O Read Inhibit
VIH
X
VIL
VIH
Don’t Care
I/O Write Inhibit
VIH
X
VIH
VIL
High Z
High Byte Input Only (8 bits)
VIL
VIH
X
VIL
VIH
Odd Byte
High Z
High Byte Output Only (8 bits)
VIL
VIH
X
VIH
VIL
Odd Byte
Don’t Care
T2-16.0 375
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