Datasheet

7
6222GS–ATARM–6-Sep-11
SAM7SE512/256/32 Summary
Two-Wire Interface
TWD Two-wire Serial Data I/O
TWCK Two-wire Serial Clock I/O
Analog-to-Digital Converter
AD0-AD3 Analog Inputs Analog Digital pulled-up inputs at reset
AD4-AD7 Analog Inputs Analog Analog Inputs
ADTRG ADC Trigger Input
ADVREF ADC Reference Analog
Fast Flash Programming Interface
PGMEN0-PGMEN2 Programming Enabling Input
PGMM0-PGMM3 Programming Mode Input
PGMD0-PGMD15 Programming Data I/O
PGMRDY Programming Ready Output High
PGMNVALID Data Direction Output Low
PGMNOE Programming Read Input Low
PGMCK Programming Clock Input
PGMNCMD Programming Command Input Low
External Bus Interface
D[31:0] Data Bus I/O
A[22:0] Address Bus Output
NWAIT External Wait Signal Input Low
Static Memory Controller
NCS[7:0] Chip Select Lines Output Low
NWR[1:0] Write Signals Output Low
NRD Read Signal Output Low
NWE Write Enable Output Low
NUB NUB: Upper Byte Select Output Low
NLB NLB: Lower Byte Select Output Low
EBI for CompactFlash Support
CFCE[2:1] CompactFlash Chip Enable Output Low
CFOE CompactFlash Output Enable Output Low
CFWE CompactFlash Write Enable Output Low
CFIOR CompactFlash I/O Read Signal Output Low
CFIOW CompactFlash I/O Write Signal Output Low
CFRNW CompactFlash Read Not Write Signal Output
CFCS[1:0] CompactFlash Chip Select Lines Output Low
Table 3-1. Signal Description List (Continued)
Signal Name Function Type
Active
Level Comments