ata5428 ATMEL Corporation, ata5428 Datasheet - Page 6

• Manufacturer Part Number: ata5428
• Description: Uhf Ask/fsk Transceiver
• Manufacturer: ATMEL Corporation

Figure 1-3.
6
SDO_TMDO
DEM_OUT
SDI_TMDI
433_N868
N_RESET
RF_OUT
RX_TX1
RX_TX2
ATA5423/ATA5425/ATA5428/ATA5429
R_PWR
PWR_H
RF_IN
CDEM
XTAL1
XTAL2
RSSI
SCK
CLK
IRQ
CS
Block Diagram
Microcontroller
Table 1-1.
LNA
interface
RX/TX
VSINT
switch
PA
Pin
42
43
44
45
46
47
48
RF transceiver
AVCC
Demodulator,
Fractional-N
Data Slicer)
synthesizer
IF-amplifier
Processing
frequency
RX_ACTIVE
FSK/ASK
Data filter
IF-filter
Signal
(Mixer
Pin Description (Continued)
Symbol
GND
NC
NC
T4
T3
T2
T1
Frontend Enable
PA_Enable (ASK)
TX_DATA (FSK)
RX/TX
FREQ
FREF
Demod_Out
Function
Key input 4 (can also be used to switch on the system (active low))
Key input 3 (can also be used to switch on the system (active low))
Key input 2 (can also be used to switch on the system (active low))
Key input 1 (can also be used to switch on the system (active low))
Indicates RX operation mode
Not connected
Not connected
Ground/backplane
RX_ACTIVE
GND
13
Digital Control Logic
TX/RX - Data buffer
XTO
Control register
SPI
Status register
Bit-check logic
Polling circuit
DVCC
Reset
Regulators
Switches
Wake-up
Supply
Power
Reset
4841D–WIRE–10/07
VS2
VS1
VAUX
VSOUT
PWR_ON
T1
T2
T3
T4
T5
TEST1
TEST2