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AS29LV016J Datasheet(PDF) 11 Page - Austin Semiconductor |
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AS29LV016J Datasheet(HTML) 11 Page - Austin Semiconductor |
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11 / 40 page  CO CO CO CO COTS PEM TS PEM TS PEM TS PEM TS PEM BOO BOO BOO BOO BOOT SECT T SECT T SECT T SECT T SECTOR FLASH OR FLASH OR FLASH OR FLASH OR FLASH AS29LV016J AS29LV016J Rev. 0.0 02/09 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 11 Austin Semiconductor, Inc. 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 V ID (11.5 V to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in Table 4 below. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order address bits (see Table 2 on page 9 and Table 3 on page 10). Table 4, immediately below, 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 Table 9 on page 21. This method does not require VID. See Command Definitions on page 17 for details on using the autoselect mode. SECTOR PROTECTION / UNPROTECTION The hardware sector group protection feature disables both program and erase operations in any sector group (see Table 2 on page 9 to Table 4 on page 11). The hardware sector group unprotection feature re-enables both program and erase operations in previously protected sector groups. Sector group protection/unprotection can be implemented via two methods. Sector protection/unprotection requires VID on the RESET# pin only, and can be implemented either insystem or via programming equipment. Figure 2 on page 13 shows the algorithms and Figure 22 on page 36 shows the timing diagram. This method uses standard microprocessor bus cycle timing. For sector group unprotect, all unprotected sector groups must first be protected prior to the first sector group unprotect write cycle. The device is shipped with all sector groups unprotected. ASI offers the option of programming and protecting sector groups at its factory prior to shipping the device through ASI Programming Service. Contact an ASI representative for details. It is possible to determine whether a sector group is protected or unprotected. See Autoselect Mode above for details. Table 4: AS29LV016J Autoselect Codes (High Voltage Method) Description Mode CE# OE# WE# A19 to A10 A9 A8 to A7 A6 A5 to A4 A3 to A2 A1 A0 DQ8 to DQ15 DQ7 to DQ0 LL H X VID XLXL L L X 01h Word L L H 22h C4h Byte L L H X C4h Word L L H 22h 49h Byte L L H X 49h X 01h (protected) X 00h (unprotected) L= Logic Low = V IL , H=Logic High=V IH , SA = Sector Address, X=Don't Care Note: The autoselect codes may also be accessed in-system via command sequences. See Table 9 on page 21. X X Sector Protection Verification L L Manufacturer ID: Spansion Device ID: S29AL016J (Top Boot Block) Device ID: S29AL016DJ (Bottom Boot Block) XX LL HSA VID L H VID VID X X L L X XL LL H H L |
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