Datasheet

SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
6
Reset/Test
NRST Microcontroller Reset I/O Low Pull-up resistor
TST Test Mode Select Input Pull-down resistor
BMS Boot Mode Select Input
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–PB31 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
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
NAND Flash Support
NANDOE NAND Flash Output Enable Output Low
NANDWE NAND Flash Write Enable Output Low
NANDCS NAND Flash Chip Select Output Low
Table 2-1. Signal Description by Peripheral (Continued)
Signal Name Function Type Active Level Comments