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AM29F100 数据表(PDF) 15 Page - Advanced Micro Devices |
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AM29F100 数据表(HTML) 15 Page - Advanced Micro Devices |
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15 / 36 page  Am29F100 15 Table 5. Am29F100 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 A15–A12 uniquely select any sector. 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. Data bits DQ15–DQ8 are don’t cares for unlock and command cycles. 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 operation. 8. The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence” for more information. 9. 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. 10. The Erase Resume command is valid only during the Erase Suspend mode. 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 XXXX F0 Manufacturer ID Word 4 5555 AA 2AAA 55 5555 90 XX00 01 Byte AAAA 5555 AAAA Device ID, Top Boot Block Word 4 5555 AA 2AAA 55 5555 90 XX01 22D9 Byte AAAA 5555 AAAA XX02 D9 Device ID, Bottom Boot Block Word 4 5555 AA 2AAA 55 5555 90 XX01 22DF Byte AAAA 5555 AAAA XX02 DF Sector Protect Verify (Note 8) Word 4 5555 AA 2AAA 55 5555 90 (SA) X02 XX00 XX01 Byte AAAA 5555 AAAA (SA) X04 00 01 Program Word 4 5555 AA 2AAA 55 5555 A0 PA PD Byte AAAA 5555 AAAA Chip Erase Word 6 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 10 Byte AAAA 5555 AAAA AAAA 5555 AAAA Sector Erase Word 6 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 SA 30 Byte AAAA 5555 AAAA AAAA 5555 Erase Suspend (Note 9) 1 XXXX B0 Erase Resume (Note 10) 1 XXXX 30 |
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