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AM29DL640D 数据表(PDF) 29 Page - Advanced Micro Devices |
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AM29DL640D 数据表(HTML) 29 Page - Advanced Micro Devices |
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29 / 54 page  December 13, 2005 Am29DL640D 27 Table 12. Am29DL640D Command Definitions Legend: X = Don’t care RA = Address of the memory location to be read. RD = Data read from location RA during read operation. PA = Address of the memory location to be programmed. Addresses latch on the falling edge of the WE# or CE# pulse, whichever happens later. PD = Data to be programmed at location PA. Data latches on the rising edge of WE# or CE# pulse, whichever happens first. SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A21–A15 uniquely select any sector in a x16-only device. Address bits A22–A16 uniquely select any sector in a x8-only device. Refer to Table 2 for information on sector addresses. BA = Address of the bank that is being switched to autoselect mode, is in bypass mode, or is being erased. 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 DQ15–DQ8 are don’t care in command sequences, except for RD and PD. 5. Unless otherwise noted, address bits A21–A11 (x16-only devices) or address bits A22–A11 (x8-only devices) are don’t cares for unlock and command cycles, unless SA or PA is required. 6. No unlock or command cycles required when bank is reading array data. 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 a bank is in the autoselect mode, or if DQ5 goes high (while the bank is providing status information). 8. The fourth cycle of the autoselect command sequence is a read cycle. The system must provide the bank address to obtain the manufacturer ID, device ID, or Secured Silicon Sector factory protect information. Data bits DQ15–DQ8 are don’t care. See the Autoselect Command Sequence section for more information. 9. The device ID must be read across the fourth, fifth, and sixth cycles. 10. The data is 80h for factory locked and 00h for not factory locked. 11. The data is 00h for an unprotected sector/sector block and 01h for a protected sector/sector block. 12. The Unlock Bypass command is required prior to the Unlock Bypass Program command. 13. The Unlock Bypass Reset command is required to return to the read mode when the bank is in the unlock bypass mode. 14. 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, and requires the bank address. 15. The Erase Resume command is valid only during the Erase Suspend mode, and requires the bank address. 16. Command is valid when device is ready to read array data or when device is in autoselect mode. Command Sequence (Note 1) (Notes) Bus Cycles (Notes 2–5) First Second Third Fourth Fifth Sixth Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Read (6) 1 RA RD Reset (7) 1 XXX F0 Manufacturer ID Word 4 555 AA 2AA 55 (BA)555 90 (BA)X00 01 Byte AAA 555 (BA)AAA Device ID (9) Word 6 555 AA 2AA 55 (BA)555 90 (BA)X01 7E (BA)X0E 02 (BA)X0F 01 Byte AAA 555 (BA)AAA (BA)X02 (BA)X1C (BA)X1E Secured Silicon Sector Factory Protect (10) Word 4 555 AA 2AA 55 (BA)555 90 (BA)X03 80/00 Byte AAA 555 (BA)AAA (BA)X06 Sector/Sector Block Protect Verify (11) Word 4 555 AA 2AA 55 (BA)555 90 (SA)X02 00/01 Byte AAA 555 (BA)AAA (SA)X04 Enter Secured Silicon Sector Region Word 3 555 AA 2AA 55 555 88 Byte AAA 555 AAA Exit Secured Silicon Sector Region Word 4 555 AA 2AA 55 555 90 XXX 00 Byte AAA 555 AAA Program Word 4 555 AA 2AA 55 555 A0 PA PD Byte AAA 555 AAA Unlock Bypass Word 3 555 AA 2AA 55 555 20 Byte AAA 555 AAA Unlock Bypass Program (12) 2 XXX A0 PA PD Unlock Bypass Reset (13) 2 BA 90 XXX 00 Chip Erase Word 6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10 Byte AAA 555 AAA AAA 555 AAA Sector Erase Word 6 555 AA 2AA 55 555 80 555 AA 2AA 55 SA 30 Byte AAA 555 AAA AAA 555 Erase Suspend (14) 1 BA B0 Erase Resume (15)1 BA 30 CFI Query (16) Word 1 55 98 Byte AA |
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