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S29AL008J70BFI020 Datasheet(PDF) 24 Page - SPANSION |
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S29AL008J70BFI020 Datasheet(HTML) 24 Page - SPANSION |
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24 / 54 page  24 S29AL008J S29AL008J_00_11 April 12, 2012 Da ta Sh e e t 9. Common Flash Memory Interface (CFI) The Common Flash Interface (CFI) specification outlines device and host system software interrogation handshake, which allows specific vendor-specified software algorithms to be used for entire families of devices. Software support can then be device-independent, JEDEC ID-independent, and forward- and backward-compatible for the specified flash device families. Flash vendors can standardize their existing interfaces for long-term compatibility. This device enters the CFI Query mode when the system writes the CFI Query command, 98h, to address 55h in word mode (or address AAh in byte mode), any time the device is ready to read array data. The system can read CFI information at the addresses given in Table 9.1 to Table 9.4 on page 25. In word mode, the upper address bits (A7–MSB) must be all zeros. To terminate reading CFI data, the system must write the reset command. The system can also write the CFI query command when the device is in the autoselect mode. The device enters the CFI query mode, and the system can read CFI data at the addresses given in Table 9.1 to Table 9.4 on page 25. The system must write the reset command to return the device to the autoselect mode. Table 9.1 CFI Query Identification String Addresses (Word Mode) Addresses (Byte Mode) Data Description 10h 11h 12h 20h 22h 24h 0051h 0052h 0059h Query Unique ASCII string “QRY” 13h 14h 26h 28h 0002h 0000h Primary OEM Command Set 15h 16h 2Ah 2Ch 0040h 0000h Address for Primary Extended Table 17h 18h 2Eh 30h 0000h 0000h Alternate OEM Command Set (00h = none exists) 19h 1Ah 32h 34h 0000h 0000h Address for Alternate OEM Extended Table (00h = none exists) Table 9.2 System Interface String Addresses (Word Mode) Addresses (Byte Mode) Data Description 1Bh 36h 0027h VCC Min. (write/erase) D7–D4: volt, D3–D0: 100 millivolt 1Ch 38h 0036h VCC Max. (write/erase) D7–D4: volt, D3–D0: 100 millivolt 1Dh 3Ah 0000h VPP Min. voltage (00h = no VPP pin present) 1Eh 3Ch 0000h VPP Max. voltage (00h = no VPP pin present) 1Fh 3Eh 0003h Typical timeout per single byte/word write 2 N µs 20h 40h 0000h Typical timeout for Min. size buffer write 2 N µs (00h = not supported) 21h 42h 0009h Typical timeout per individual block erase 2 N ms 22h 44h 0000h Typical timeout for full chip erase 2 N ms (00h = not supported) 23h 46h 0005h Max. timeout for byte/word write 2 N times typical 24h 48h 0000h Max. timeout for buffer write 2 N times typical 25h 4Ah 0004h Max. timeout per individual block erase 2 N times typical 26h 4Ch 0000h Max. timeout for full chip erase 2 N times typical (00h = not supported) |
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