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AM29F002B 数据表(PDF) 12 Page - Advanced Micro Devices |
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AM29F002B 数据表(HTML) 12 Page - Advanced Micro Devices |
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12 / 42 page  10 Am29F002B/Am29F002NB 21527D5 November 1, 2006 D A TA SH EE T Table 3. Am29F002B/Am29F002NB Bottom Boot Block Sector Address Table Autoselect Mode The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on DQ7–DQ0. This mode is primarily intended for programming equipment to automatically match a device to be programmed with its corresponding programming algorithm. However, the autoselect codes can also be accessed in-system through the command register. When using programming equipment, the autoselect mode requires VID on address pin A9. Address pins A6, A1, and A0 must be as shown in Autoselect Codes (High Voltage Method) table. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits. Refer to the corresponding Sector Address Tables. The Command Definitions table shows the remaining address bits that are don’t care. When all necessary bits have been set as required, the programming equipment may then read the corresponding identifier code on DQ7–DQ0. To access the autoselect codes in-system, the host system can issue the autoselect command via the command register, as shown in the Command Defini- tions table. This method does not require VID. See “Command Definitions” for details on using the autose- lect mode. Table 4. Am29F002B/Am29F002NB Autoselect Codes (High Voltage Method) L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care. Sector Protection/Unprotection The hardware sector protection feature disables both program and erase operations in any sector. The hard- ware sector unprotection feature re-enables both program and erase operations in previously protected sectors. Sector A17 A16 A15 A14 A13 Sector Size (Kbytes) Address Range (in hexadecimal) SA0 0 0 0 0 X 16 00000h–03FFFh SA1 0 0 0 1 0 8 04000h–05FFFh SA2 0 0 0 1 1 8 06000h–07FFFh SA3 0 0 1 X X 32 08000h–0FFFFh SA4 0 1 X X X 64 10000h–1FFFFh SA5 1 0 X X X 64 20000h–2FFFFh SA6 1 1 X X X 64 30000h–3FFFFh Description CE# OE# WE# A17 to A13 A12 to A10 A9 A8 to A7 A6 A5 to A2 A1 A0 DQ7 to DQ0 Manufacturer ID: AMD L L H X X VID X L X L L 01h Device ID: Am29F002B/Am29F002NB (Top Boot Block) LL H XX VID XLX L H B0h LL H Device ID: Am29F002B/Am29F002NB (Bottom Boot Block) LL H XX VID X L X L H 34h LL H Sector Protection Verification L L H SA X VID XLX H L 01h (protected) 00h (unprotected) |
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