IA4420 Datasheet, PDF (4/29 Pages) List of Unclassifed Manufacturers – Universal ISM Band FSK Transceiver

PACKAGE PIN DEFINITIONS
Pin type key: D=digital, A=analog, S=supply, I=input, O=output, IO=input/output
SDI
SCK
nSEL
SDO
nIRQ
FSK / DATA / nFFS
DCLK / CFIL / FFIT
CLK
nINT / VDI
ARSSI
VDD
RF1
RF2
VSS
nRES
XTL / REF
IA4420
Pin Name Type
1
SDI
DI
2
SCK DI
3 nSEL DI
4 SDO DO
5 nIRQ DO
FSK DI
6 DATA DO
nFFS DI
DLCK DO
CFIL AIO
7
FFIT DO
8
CLK DO
9
XTL AIO
REF AIO
10 nRES DIO
11 VSS
S
12 RF2 AIO
13 RF1 AIO
14 VDD
S
15 ARSSI AO
nINT DI
16
VDI DO
Function
Data input of the serial control interface (SPI compatible)
Clock input of the serial control interface
Chip select input of the serial control interface (active low)
Serial data output with bus hold
Interrupt request output (active low)
Transmit FSK data input
Received data output (FIFO not used)
FIFO select input (active low) In FIFO mode, when bit ef is set in Configuration Setting Command
Received data clock output (Digital filter used, FIFO not used)
External data filter capacitor connection (Analog filter used)
FIFO interrupt (active high) Number of the bits in the RX FIFO that reach the preprogrammed limit
In FIFO mode, when bit ef is set in Configuration Setting Command
Microcontroller clock output
Crystal connection (the other terminal of crystal to VSS) or external reference input
External reference input. Use 33 pF series coupling capacitor
Open drain reset output with internal pull-up and input buffer (active low)
Ground reference voltage
RF differential signal input/output
RF differential signal input/output
Positive supply voltage
Analog RSSI output
Interrupt input (active low)
Valid data indicator output
Note: The actual mode of the multipurpose pins (pin 6 and 7) is determined by the TX/RX data I/O settings of the
transceiver.
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