AMC008DFLKA datasheet(7/46 Pages) AMD

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AmC0XXDFLKA

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

Notes:

1. X indicates a don’t care value.

2. VPP pins are not connected in the 5.0 Volt-only Flash Memory Card.

3. Refer to Table 5 for valid DIN during a word write operation.

4. Refer to Table 3 and 4 for valid DIN during a byte write operation.

5. During odd byte access, A0 = VIH 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.

Function

REG

CE2CE1OE

D8–D15

D0–D7

Read Mode

Standby Mode

High-Z

Word Access

Data Out-Odd

Data Out-Even

Low Byte Access

High-Z

Data Out-Even

Odd Byte Access

High-Z

Data Out-Odd

Odd-Byte-Only Access

HLHLH

Data Out-Odd

High-Z

Write Mode

Standby Mode

Word Access (Note 3)

Data In-Odd

Data In-Even

Even Byte Access (Note 4)

HLHL

High-Z

Data In-Even

Odd Byte Access (Note 4)

HLHLH

High-Z

Data In-Odd

Odd-Byte-Only Access (Note 4)

Data In-Odd

High-Z

Output Disable

High-Z

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