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AM29F004B 数据表(PDF) 18 Page - Advanced Micro Devices |
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AM29F004B 数据表(HTML) 18 Page - Advanced Micro Devices |
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18 / 37 page  16 Am29F004B 8/5/05 AD VA NC E IN FO RM AT ION 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 A18–A13 uniquely select any sector. SA+ = The sector address must be asserted in combination with A0 = 0, A1 = 1, A5 = 1, and A6 = 0 (for protect) or 1 (for unprotect). Notes: 1. See Table 1 for description of bus operations. 2. All values are in hexadecimal. 3. Except when reading array or autoselect data, all bus cycles are write operations. 4. Address bits A18–A11 are don’t cares for unlock and command cycles, except when PA or SA is required. 5. No unlock or command cycles required when reading array data. 6. The Reset command is required to return to reading array data when device is in the autoselect mode, or if DQ5 goes high (while the device is providing status data). 7. The fourth cycle of the autoselect command sequence is a read cycle. 8. The data is 00h for an unprotected sector and 01h for a protected sector. See Autoselect Command Sequence on page 13 for more information. 9. To activate the sequence, OE# must be at VID. 10. The sector relock command in the second cycle may be written as either 00h or F0h. 11. 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. 12. The Erase Resume command is valid only during the Erase Sus- pend mode. Table 5. Am29F004B Command Definitions Command Sequence (Note 1) Bus Cycles (Notes 2–4) First Second Third Fourth Fifth Sixth Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Read (Note 5) 1 RA RD Reset (Note 6) 1 XXX F0 Autoselect (Note 7) Manufacturer ID 4 555 AA 2AA 55 555 90 X00 01 Device ID, Top Boot Block 4 555 AA 2AA 55 555 90 X01 77 Device ID, Bottom Boot Block 4 555 AA 2AA 55 555 90 X01 7B Sector Protect Verify (Note 8) 4 555 AA 2AA 55 555 90 (SA) X02 00 01 Program 4 555 AA 2AA 55 555 A0 PA PD Chip Erase 6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10 Sector Erase 6 555 AA 2AA 55 555 80 555 AA 2AA 55 SA 30 Erase Suspend (Note 11) 1 XXX B0 Erase Resume (Note 12) 1 XXX 30 Temporary Sector Unprotect Mode (Note 9) Enter TSU Mode 3 555 AA 2AA 55 555 20 Program 2 XXX A0 PA PD Sector Erase 4 XXX 80 XXX AA XXX 55 SA 30 Chip Erase 4 XXX 80 XXX AA XXX 55 555 10 Sector Unlock (Note 9) 3 555 AA 2AA 55 555 24 SA+ 60 SA+ 60 SA+ 40 Sector Relock (Notes 9, 10) 2 XXX 90 XXX 00 |
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