ATA5429 ATMEL Corporation, ATA5429 Datasheet - Page 36

• Manufacturer Part Number: ATA5429
• Description: (ATA5423 - ATA5429) UHF ASK/FSK Transceiver
• Manufacturer: ATMEL Corporation

5.6
6. Microcontroller Interface
7. Digital Control Logic
7.1
36
2–Battery Application
Register Structure
ATA5423/25/28/29 [Preliminary]
The supply voltage range is 4.4 V to 6.6 V and VAUX is connected to an inductive supply.
Figure 5-6.
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
on page 7
to the supply voltage of the microcontroller as in
The configuration of the transceiver is stored in RAM cells. The RAM contains a 16
TX/RX data buffer and a 6
serial interface (CS, SCK, SDI_TMDI, SDO_TMDO).
The 1
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).
8-bit status register is not part of the RAM and is readable via the 4–wire serial
and
RF Transceiver
2–Battery Application with Inductive Emergency Supply
Digital Control
Figure 2-3 on page 9
ATA5423/ATA5425/
ATA5428/ATA5429
Logic
SDO_TMDO
8-bit control register and is writable and readable via a 4–wire
DEM_OUT
SDI_TMDI
NRESET
VSOUT
VSINT
AVCC
DVCC
VAUX
VS2
SCK
or to connect the microcontroller and the pin VSINT directly
VS1
CLK
IRQ
CS
Figure 2.2 on page
4.4 V to 6.6 V
VS
IN
IN
IN
IN
OUT
OUT
OUT
8.
Microcontroller
4841A–RKE–02/05
Figure 2-1
8-bit