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AM29F010B-70PF Scheda tecnica(PDF) 10 Page - SPANSION |
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AM29F010B-70PF Scheda tecnica(HTML) 10 Page - SPANSION |
10 / 33 page 8 Am29F010B Am29F010B_00_C7 October 31, 2006 D A TA SH EE T Program and Erase Operation Status During an erase or program operation, the system may check the status of the operation by reading the status bits on DQ7–DQ0. Standard read cycle timings and ICC read specifications apply. Refer to “Write Operation Status” for more information, and to each AC Charac- teristics section in the appropriate data sheet for timing diagrams. Standby Mode When the system is not reading or writing to the device, it can place the device in the standby mode. In this mode, current consumption is greatly reduced, and the outputs are placed in the high impedance state, inde- pendent of the OE# input. The device enters the CMOS standby mode when the CE# pin is held at VCC ± 0.5 V. (Note that this is a more restricted voltage range than VIH.) The device enters the TTL standby mode when CE# is held at VIH. The device requires the standard access time (tCE) before it is ready to read data. If the device is deselected during erasure or program- ming, the device draws active current until the operation is completed. ICC3 in the DC Characteristics tables represents the standby current specification. Output Disable Mode When the OE# input is at VIH, output from the device is disabled. The output pins are placed in the high imped- ance state. Table 2. Am29F010B Sector Addresses Table Note: All sectors are 16 Kbytes in size. 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 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. Sector A16 A15 A14 Address Range SA0 0 0 0 00000h-03FFFh SA1 0 0 1 04000h-07FFFh SA2 0 1 0 08000h-0BFFFh SA3 0 1 1 0C000h-0FFFFh SA4 1 0 0 10000h-13FFFh SA5 1 0 1 14000h-17FFFh SA6 1 1 0 18000h-1BFFFh SA7 1 1 1 1C000h-1FFFFh |
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