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AT91SAM9XE256-CU Datasheet(PDF) 7 Page - ATMEL Corporation |
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AT91SAM9XE256-CU Datasheet(HTML) 7 Page - ATMEL Corporation |
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7 / 50 page  7 6254AS–ATARM–14-Feb-08 AT91SAM9XE128/256/512 Preliminary Flash Memory ERASE Flash and NVM Configuration Bits Erase Command Input High Pull-down resistor Reset/Test NRST Microcontroller Reset I/O Low Pull-up resistor TST Test Mode Select Input Pull-down resistor. Accepts between 0V and VDDBU. Debug Unit - DBGU DRXD Debug Receive Data Input DTXD Debug Transmit Data Output Advanced Interrupt Controller - AIC IRQ0 - IRQ2 External Interrupt Inputs Input FIQ Fast Interrupt Input Input PIO Controller - PIOA - PIOB - PIOC PA0 - PA31 Parallel IO Controller A I/O Pulled-up input at reset PB0 - PB30 Parallel IO Controller B I/O Pulled-up input at reset PC0 - PC31 Parallel IO Controller C I/O Pulled-up input at reset External Bus Interface - EBI D0 - D31 Data Bus I/O Pulled-up input at reset A0 - A25 Address Bus Output 0 at reset NWAIT External Wait Signal Input Low Static Memory Controller - SMC NCS0 - NCS7 Chip Select Lines Output Low NWR0 - NWR3 Write Signal Output Low NRD Read Signal Output Low NUB Upper Byte Select Output Low NLB Lower Byte Select Output Low NWE Write Enable Output Low NBS0 - NBS3 Byte Mask Signal Output Low CompactFlash Support CFCE1 - CFCE2 CompactFlash Chip Enable Output Low CFOE CompactFlash Output Enable Output Low CFWE CompactFlash Write Enable Output Low CFIOR CompactFlash IO Read Output Low CFIOW CompactFlash IO Write Output Low CFRNW CompactFlash Read Not Write Output CFCS0 - CFCS1 CompactFlash Chip Select Lines Output Low Table 3-1. Signal Description List (Continued) Signal Name Function Type Active Level Comments |
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