4

6308A–DRMSD–10-May-07

ATSAM2195

Table 2-5.

Miscellaneous group

Pin Name

Pin #

Type

Function

X1-X2

29, 28

-

9.6 MHz crystal connection. An external 9.6 MHz clock can also be used on X1

(1.95Vpp max through 47 pF capacitor). X2 cannot be used to drive external

circuits.

RESET

9IN

Reset input, active low. This is a Schmitt trigger input, allowing direct connection

to an RC network

OUTVC18

35

PWR

3.3V to 1.8 V regulator output. When 3.3V single supply application this pin can

be used to power VD18 pins, and VA18 pin through a serial inductor filter (better

result) or a 10 ohm resistor.

Decoupling capacitors 470 pF in parallel with 2.2 or 4.7 µF must be connected

between OUTVC18 and GND.

PWROUT

39

PWR

Power switch output. When 1.8V single supply application this pin can be used to

power VD18 pins, and VA18 pin through a serial inductor filter (better result) or a

10 ohm resistor.

PDWN

37

IN

Power down, active low. When power down is active, all digital outputs are set to

logic level 0, D0-D7 bus is set in high Z, analog outputs decrease to 0V, the PLL

and crystal oscillator are stopped.

3.3V single supply application: If the built-in regulator is used then 1.8V supply is

removed from the core. To exit from power down, PDWN must be set to VD33,

then RESET applied. When unused this pin must be connected to VD33.

1.8V single supply application: If the built-in power switch is used then 1.8V

supply is removed from the core. To exit from power down, PDWN must be set to

VD18, then RESET applied. When unused this pin must be connected to VD18

TEST0-TEST1-

TEST2

36, 27, 32

IN

Test pins. Should be grounded