Datasheet

309
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
Table 19-1. Signal Description List
Signal Name Function Type
Active
Level Comments
Power
VDDIO I/O Lines Power Supply Power Apply external 3.0V-3.6V
VDDBU Backup I/O Lines Power Supply Power Apply external 3.0V-3.6V
VDDUTMI UTMI+ Interface Power Supply Power Apply external 3.0V-3.6V
VDDANA ADC Analog Power Supply Power Apply external 3.0V-3.6V
VDDIN Voltage Regulator Input Power Apply external 3.0V-3.6V
VDDCORE Core Power Supply Power Apply external 1.65V-1.95V
VDDPLL PLLs and Oscillator Power Supply Power Apply external 1.65V-1.95V
GND Ground Ground
GNDPLL Ground Ground
GNDBU Ground Ground
GNDANA Ground Ground
GNDUTMI Ground Ground
Clocks
XIN Clock Input Input 0 to 50MHz (0-VDDCORE square wave)
Test
TST Test Mode Select Input High Must be connected to VDDIO
NRSTB Asynchronous Microcontroller Reset Input High Must be connected to VDDIO
FWUP Wake-up pin Input High Must be connected to VDDIO
PIO
PGMNCMD Valid command available Input Low Pulled-up input at reset
PGMRDY
0: Device is busy
1: Device is ready for a new command
Output High Pulled-up input at reset
PGMNOE Output Enable (active high) Input Low Pulled-up input at reset
PGMNVALID
0: DATA[15:0] is in input mode
1: DATA[15:0] is in output mode
Output Low Pulled-up input at reset
PGMM[3:0] Specifies DATA type (See Table 19-3) Input Pulled-up input at reset
PGMD[15:0] Bi-directional data bus Input/Output Pulled-up input at reset
PA0 Input Must be connected to VDDIO at power-up
PA1 Input Must be connected to VDDIO at power-up
PA2 Input Must be connected to GND at power-up
PA3 Input Must be connected to GND at power-up
NRST Input
Must be connected at start-up.
And toggle at VDDIO