ATA5428-PLSW datasheet(36/100 Pages) ATMEL

36 / 100 page

4841D–WIRE–10/07

ATA5423/ATA5425/ATA5428/ATA5429

5.6

2 Li Battery Application (6V)

The supply voltage range is 4.4V to 6.6V and VAUX is connected to an inductive supply.

Figure 5-6.

2 Li Battery Application (6V) with Inductive Emergency Supply

Microcontroller Interface

The microcontroller interface is a level converter which converts all internal digital signals that

are referred to the DVCC voltage into the voltage used by the microcontroller. Therefore, the pin

VSINT has to be connected to the supply voltage of the microcontroller.

This makes it possible to use the internal voltage regulator/switch at pin VSOUT as in Figure 2-1

on page 7 and Figure 2-3 on page 9 or to connect the microcontroller and the pin VSINT directly

to the supply voltage of the microcontroller as in Figure 2.2 on page 8.

Digital Control Logic

7.1

The configuration of the transceiver is stored in RAM cells. The RAM contains a 16

× 8-bit

TX/RX data buffer and a 6

× 8-bit control register and is writable and readable via a 4-wire serial

interface (CS, SCK, SDI_TMDI, SDO_TMDO).

The 1

× 8-bit status register is not part of the RAM and is readable via the 4-wire serial interface.

The RAM and the status information are stored as long as the transceiver is in any active mode

(DVCC = VS1 or DVCC = V_REG2) and are lost when the transceiver switches to OFF mode

(DVCC =OFF).

OUT

VSOUT

VSINT

NRESET

CLK

IRQ

SCK

SDI_TMDI

SDO_TMDO

DVCC

RF Transceiver

ATA5423/ATA5425/

ATA5428/ATA5429

ATmega

48/88/168

Digital Control

Logic

AVCC

VAUX

VS2

4.4V to 6.6V

VS1

DEM_OUT

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