AMC0XXDFLKA Datasheet, PDF (7/46 Pages) Advanced Micro Devices – 4, 8, 20, or 32 Megabyte 5.0 Volt-only Flash Memory PC Card

of a card. The CIS is stored in the attribute memory
space beginning at address 00000H. The D-Series
cards contain a separate EEPROM for the Card Infor-
mation Structure. D0–D7 are active during attribute
memory accesses. D8–D15 should be ignored. Odd or-
der bytes present invalid data. Refer to Table 2.
Word-Wide Operations
The D-Series cards provide the flexibility to operate on
data in a byte-wide or word-wide format. In word-wide
operations the CE1 and CE2 must be low and A0 is not
used for any addressing.
Table 1. Common Memory Bus Operations
Function
REG CE2 CE1 OE WE A0
D8–D15
D0–D7
Read Mode
Standby Mode
X
H
H
X
X
X
High-Z
High-Z
Word Access
H
L
L
L
H
X
Data Out-Odd Data Out-Even
Low Byte Access
H
H
L
L
H
L
High-Z
Data Out-Even
Odd Byte Access
H
H
L
L
H
H
High-Z
Data Out-Odd
Odd-Byte-Only Access
H
L
H
L
H
X Data Out-Odd
High-Z
Write Mode
Standby Mode
X
H
H
X
X
X
X
X
Word Access (Note 3)
Even Byte Access (Note 4)
H
L
L
H
L
X
Data In-Odd Data In-Even
H
H
L
H
L
L
High-Z
Data In-Even
Odd Byte Access (Note 4)
H
H
L
H
L
H
High-Z
Data In-Odd
Odd-Byte-Only Access (Note 4)
H
L
H
H
L
X
Data In-Odd
High-Z
Output Disable
H
X
X
H
H
X
High-Z
High-Z
Notes:
1. X indicates a don’t care value.
2. V_PP pins are not connected in the 5.0 Volt-only Flash Memory Card.
3. Refer to Table 5 for valid D_IN during a word write operation.
4. Refer to Table 3 and 4 for valid D_IN during a byte write operation.
5. During odd byte access, A0 = V_IH outputs or inputs the “odd” byte (high byte) of the x16 word on D0–D7. This is accomplished
internal to the card by transposing D8–D15 to D0–D7.
6. During odd-byte-only access , A0 = X outputs or inputs the “odd” byte (high byte) of the x16 word on D8–D15.
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