ATA5823/ATA5824
Table 2-1.
Pin Description (Continued)
Pin
42
43
44
45
46
47
48
Symbol
NC
Function
Not connected
SCK_POL
SCK_PHA
N_PWR_ON
RX_ACTIVE
NC
Polarity of the serial clock
Phase of the serial clock
Keyboard input (can also be used to switch on the system, active low)
Indicates RX operation mode
Not connected
NC
Not connected
GND
Ground/Backplane (exposed die pad)
Figure 2-2. Block Diagram
433_N868
SETPWR
VS2
VS1
Power
Supply
RF transceiver
Digital control logic
Frontend Enable
PA_Enable (ASK)
TX_DATA (FSK)
R_PWR
RF_OUT
PA
TX/RX -
Data buffer
Switches
Regulators
Wake-up
Reset
RX/TX
PWR_H
RX_TX1
RX_TX2
Fract.-N-
Control register
Status register
Polling circuit
Bit-check logic
Synchronous logic
(Full duplex
FREQ
FREF
13
PWR_ON
Frequency
Synthesizer
RX/TX
switch
N_PWR_ON
Signal
processing
(Mixer
Demod_Out
IF-filter
operation mode)
LNA
RF_IN
IF-amplifier
FSK/ASK
demodulator
Data filter
Data slicer)
CDEM
RSSI
Reset
XTAL1
XTAL2
XTO
TEST3
CLK
TEST1
TEST2
POUT
IRQ
µC_Interface
CS
CS_POL
SCK
SPI
SCK_POL
SCK_PHA
SDI_TMDI
SDO_TMDO
5
4829D–RKE–06/06