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AMC001CFLKA Arkusz danych(PDF) 6 Page - Advanced Micro Devices |
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AMC001CFLKA Arkusz danych(HTML) 6 Page - Advanced Micro Devices |
6 / 42 page 6 AmC0XXCFLKA 5/4/98 Word-Wide Operations The “C” series cards provide the flexibility to operate on data in a byte-wide or word-wide format. In word-wide operations the Low-bytes are controlled with CE1 when A0 = 0. The High-bytes are controlled with CE2 with A0 = don’t care. Table 1. Common Memory Bus Operations Legend: X = Don’t Care, where Don’t Care is either at VIL or VIH level. See DC Characteristics for voltage levels of normal TTL or CMOS input levels. Notes: 1. VPP pins are not connected in the 5.0 V-Only Flash Memory Card. 2. Manufacturer and device codes may be accessed via a command register write sequence. (Refer to Autoselect Command in Tables 3 and 4.) 3. Standby current is ICCS. 4. Refer to Tables 3 and 4 for valid DIN during a byte write operation. 5. Refer to Table 5 for valid DIN during a word write operation. 6. Byte access—Even. In this x8 mode, A0 = VIL outputs or inputs the “even” byte (low byte) of the x16 word on D0–D7. 7. Byte access—Odd. In this x8 mode, 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. 8. Odd byte only access. In this x8 mode, A0 = X outputs or inputs the “odd” byte (high byte) of the x16 word on D8–D15. 9. x16 word accesses present both “even” (low) and “odd” (high) bytes. A0 = X. Pins/Operation REG CE2CE1OE WE A0 D8–D15 D0–D7 READ-ONLY Read (x8) (Note 6) VIH VIH VIL VIL VIH VIL High-Z Data Out-Even Read (x8) (Note 7) VIH VIH VIL VIL VIH VIH High-Z Data Out-Odd Read (x8) (Note 8) VIH VIL VIH VIL VIH X Data Out-Odd High-Z Read (x16) (Note 9) VIH VIL VIL VIL VIH X Data Out-Odd Data Out-Even Output Disable VIH XX VIH VIH X High-Z High-Z Standby (Note 3) X VIH VIH X X X High-Z High-Z READ/WRITE Read (x8) (Notes 2, 6) VIH VIH VIL VIL VIH VIL High-Z Data Out-Even Read (x8) (Notes 2, 7) VIH VIH VIL VIL VIH VIH High-Z Data Out-Odd Read (x8) (Notes 2, 8) VIH VIL VIH VIL VIH X Data Out-Odd High-Z Read (x16) (Notes 2, 9) VIH VIL VIL VIL VIH X Data Out-Odd Data Out-Even Write (x8) (Notes 4, 6) VIH VIH VIL VIH VIL VIL High-Z Data In-Even Write (x8) (Notes 4, 7) VIH VIH VIL VIH VIL VIH High-Z Data In-Odd Write (x8) (Notes 4, 8) VIH VIL VIH VIH VIL X Data In-Odd High-Z Write (x16) (Notes 5, 9) VIH VIL VIL VIH VIL X Data In-Odd Data In-Even Output Disable VIH XX VIH VIL X High-Z High-Z Standby (Note 3) X VIH VIH X X X High-Z High-Z Volt-only? |
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