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AM29LV6402M Datasheet(PDF) 34 Page - Advanced Micro Devices |
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AM29LV6402M Datasheet(HTML) 34 Page - Advanced Micro Devices |
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34 / 57 page  32 Am29LV6402M January 23, 2006 Table 11. Command Definitions (x16 Mode, WORD# = V IL) Legend: X = Don’t care RA = Read Address of the memory location to be read. RD = Read Data read from location RA during read operation. PA = Program Address. Addresses latch on the falling edge of the WE# or CE# pulse, whichever happens later. PD = Program Data for location PA. Data latches on the rising edge of WE# or CE# pulse, whichever happens first. SA = Sector Address of sector to be verified (in autoselect mode) or erased. Address bits A21–A15 uniquely select any sector. WBL = Write Buffer Location. Address must be within the same write buffer page as PA. WC = Word Count. Number of write buffer locations to load minus 1. Notes: 1. See Table 1 for description of bus operations. 2. All values are in hexadecimal. 3. Except for the read cycle and the fourth cycle of the autoselect command sequence, all bus cycles are write cycles. 4. Data bits DQ31–DQ15 are don’t care in command sequences. 5. Unless otherwise noted, address bits A21–A11 are don’t cares. 6. No unlock or command cycles required when device is in read mode. 7. The Reset command is required to return to the read mode (or to the erase-suspend-read mode if previously in Erase Suspend) when the device is in the autoselect mode, or if DQ5 and/or DQ13goes high while the device is providing status information. 8. The fourth cycle of the autoselect command sequence is a read cycle. Data bits DQ31–DQ16 are don’t care. See the Autoselect Command Sequence section for more information. 9. The device ID must be read in three cycles. 10. If WP# protects the highest address sector, the data is 9898h for factory locked and 1818h for not factory locked. If WP# protects the lowest address sector, the data is 8888h for factory locked and 0808h for not factor locked. 11. The total number of cycles in the command sequence is determined by the number of words written to the write buffer. The maximum number of cycles in the command sequence is 37. 12. The data is 0000h for an unprotected sector group and 0101h for a protected sector group. 13. Command sequence resets device for next command after aborted write-to-buffer operation. 14. The Unlock Bypass command is required prior to the Unlock Bypass Program command. 15. The Unlock Bypass Reset command is required to return to the read mode when the device is in the unlock bypass mode. 16. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode. The Erase Suspend command is valid only during a sector erase operation. 17. The Erase Resume command is valid only during the Erase Suspend mode. 18. Command is valid when device is ready to read array data or when device is in autoselect mode. Command Sequence (Note 1) Bus Cycles (Notes 2–5) First Second Third Fourth Fifth Sixth Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Read (Note 6) 1 RA RD Reset (Note 7) 1 XXX F0F0 Manufacturer ID 4 AAA AAAA 555 5555 AAA 9090 X00 0101 Device ID (Note 9) 6 AAA AAAA 555 5555 AAA 9090 X02 7E7E X1C 0C0C X1E 0101 SecSi TM Sector Factory Protect (Note 10) 4 AAA AAAA 555 5555 AAA 9090 X06 (Note 10) Sector Protect Verify (Note 12) 4 AAA AAAA 555 5555 AAA 9090 (SA)X04 0000/ 0101 Enter SecSi Sector Region 3 AAA AAAA 555 5555 AAA 8888 Exit SecSi Sector Region 4 AAA AAAA 555 5555 AAA 9090 XXX 0000 Program 4 AAA AAAA 555 5555 AAA A0A0 PA PD Write to Buffer (Note 11) 3 AAA AAAA 555 5555 SA 2525 SA WC PA PD WBL PD Program Buffer to Flash 1 SA 2929 Write to Buffer Abort Reset (Note 13) 3 AAA AAAA 555 5555 AAA F0F0 Unlock Bypass 3 AAA AAAA 555 5555 AAA 2020 Unlock Bypass Program (Note 14) 2 XXX A0A0 PA PD Unlock Bypass Reset (Note 15) 2 XXX 9090 XXX 0000 Chip Erase 6 AAA AAAA 555 5555 AAA 8080 AAA AAAA 555 5555 AAA 1010 Sector Erase 6 AAA AAAA 555 5555 AAA 8080 AAA AAAA 555 5555 SA 3030 Program/Erase Suspend (Note 16) 1 XXX B0B0 Program/Erase Resume (Note 17) 1 XXX 3030 CFI Query (Note 18) 1 AA 9898 |
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