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EPM7256AE 数据表(PDF) 17 Page - Altera Corporation |
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EPM7256AE 数据表(HTML) 17 Page - Altera Corporation |
17 / 64 page Altera Corporation 17 MAX 7000A Programmable Logic Device Data Sheet f For more information on using the Jam STAPL language, see Application Note 88 (Using the Jam Language for ISP & ICR via an Embedded Processor) and Application Note 122 (Using Jam STAPL for ISP & ICR via an Embedded Processor). ISP circuitry in MAX 7000AE devices is compliant with the IEEE Std. 1532 specification. The IEEE Std. 1532 is a standard developed to allow concurrent ISP between multiple PLD vendors. Programming Sequence During in-system programming, instructions, addresses, and data are shifted into the MAX 7000A device through the TDI input pin. Data is shifted out through the TDO output pin and compared against the expected data. Programming a pattern into the device requires the following six ISP stages. A stand-alone verification of a programmed pattern involves only stages 1, 2, 5, and 6. 1. Enter ISP. The enter ISP stage ensures that the I/O pins transition smoothly from user mode to ISP mode. The enter ISP stage requires 1ms. 2. Check ID. Before any program or verify process, the silicon ID is checked. The time required to read this silicon ID is relatively small compared to the overall programming time. 3. Bulk Erase. Erasing the device in-system involves shifting in the instructions to erase the device and applying one erase pulse of 100 ms. 4. Program. Programming the device in-system involves shifting in the address and data and then applying the programming pulse to program the EEPROM cells. This process is repeated for each EEPROM address. 5. Verify. Verifying an Altera device in-system involves shifting in addresses, applying the read pulse to verify the EEPROM cells, and shifting out the data for comparison. This process is repeated for each EEPROM address. 6. Exit ISP. An exit ISP stage ensures that the I/O pins transition smoothly from ISP mode to user mode. The exit ISP stage requires 1ms. |
类似零件编号 - EPM7256AE |
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类似说明 - EPM7256AE |
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