Datasheet

6
6430FS–ATARM–10-Feb-12
SAM3U Series
Flash Memory
ERASE Flash and NVM Configuration Bits Erase
Command
Input High VDDBU Internal permanent 15K
pulldown
Reset/Test
NRST Microcontroller Reset I/O Low VDDIO
Internal permanent
pullup
NRSTB Asynchronous Microcontroller Reset Input Low
VDDBU
Internal permanent
pullup
TST Test Select Input
Internal permanent
pulldown
Universal Asynchronous Receiver Transceiver - UART
URXD UART Receive Data Input
UTXD UART Transmit Data Output
PIO Controller - PIOA - PIOB - PIOC
PA0 - PA31 Parallel IO Controller A I/O
VDDIO
•Schmitt Trigger
(1)
Reset State:
•PIO Input
•Internal pullup enabled
PB0 - PB31 Parallel IO Controller B I/O
•Schmitt Trigger
(2)
Reset State:
•PIO Input
•Internal pullup enabled
PC0 - PC31 Parallel IO Controller C I/O
•Schmitt Trigger
(3)
Reset State:
•PIO Input
•Internal pullup enabled
External Bus Interface
D0 - D15 Data Bus I/O
A0 - A23 Address Bus Output
NWAIT External Wait Signal Input Low
Static Memory Controller - SMC
NCS0 - NCS3 Chip Select Lines Output Low
NWR0 - NWR1 Write Signal Output Low
NRD Read Signal Output Low
NWE Write Enable Output Low
NBS0 - NBS1 Byte Mask Signal Output Low
NAND Flash Controller - NFC
NANDOE NAND Flash Output Enable Output Low
NANDWE NAND Flash Write Enable Output Low
NANDRDY NAND Ready Input
Table 3-1. Signal Description List (Continued)
Signal Name Function Type
Active
Level
Voltag e
Reference Comments