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AM29F002NB-120JCB Datasheet(PDF) 9 Page - Advanced Micro Devices |
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AM29F002NB-120JCB Datasheet(HTML) 9 Page - Advanced Micro Devices |
9 / 37 page Am29F002/Am29F002N 9 PR ELIMIN A R Y Table 3. Am29F002/Am29F002N Bottom Boot Block Sector Address Table Autoselect Mode The autoselect mode provides manufacturer and de- vice 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 (11.5 V to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in Autoselect Codes (High Voltage Method) table. In addi- tion, when verifying sector protection, the sector ad- dress must appear on the appropriate highest order address bits. Refer to the corresponding Sector Ad- dress 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 program- ming 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. Am29F002/Am29F002N 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 hardware sector unprotection feature re-enables both program and erase operations in previously pro- tected sectors. Sector protection/unprotection must be implemented using programming equipment. The procedure re- quires a high voltage (VID) on address pin A9 and the control pins. Details on this method are provided in the supplements, publication numbers 20819 and 21183. Sector A17 A16 A15 A14 A13 Sector Size (Kbytes) Address Range (in hexadecimal) SA0 000 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 LXL L 01h Device ID: Am29F002/Am29F002N (Top Boot Block) LL H XX VID X LXL H B0h LL H Device ID: Am29F002/Am29F002N (Bottom Boot Block) LL H XX VID X LXL H 34h LL H Sector Protection Verification L L H SA X VID XL X H L 01h (protected) 00h (unprotected) |
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