PCINT13 datasheet(192/294 Pages) ATMEL

Part #	PCINT13

Description	High Performance, Low Power Atmel AVR 8-bit Microcontroller Advanced RISC Architecture

PDF	294 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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192 / 294 page

192

9219A–RFID–01/11

Atmel ATA5505 [Preliminary]

16.2

Operation Modes for Powering the Reader/Writer Front End

The following section explains the three different operation modes used to power the

Reader/Writer front end.

16.2.1

5V Operation

In this mode all internal circuits are operated from one 5V power rail (see Figure 16-2).

In this

case, V

S, VEXT and DVS serve as inputs. VBatt is not used but should also be connected to the

5V supply rail.

Figure 16-2. 5V Supply

16.2.2

Increased Power Operation

In this mode the driver voltage, D

VS, and the pre-driver supply, VEXT, are operated at a higher

voltage than the rest of the circuitry to obtain a higher driver-output swing and thus a higher

magnetic field (see Figure 16-3). The internal supply voltage V

S is derived from VBatt input volt-

age and needs capacitor circuitry, at VS pin for blocking. This operation mode is intended for

use in applications requiring extended communication distance.

Figure 16-3. 8V Supply

Batt

Standby

+5V (stabilized)

EXT

Batt

Standby

EXT

7V to 8V (stabilized)

PCINT13 Datasheet(PDF) 192 Page - ATMEL Corporation