EM2420 ETC [List of Unclassifed Manufacturers], EM2420 Datasheet - Page 15

• Manufacturer Part Number: EM2420
• Description: 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
• Manufacturer: ETC [List of Unclassifed Manufacturers]

Pin
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
NOTES:
The exposed die attach pad must be connected to solid ground plane as this is the main ground connection for the
chip.
Note that digital inputs SCLK, SI and CSn are high-impedance inputs (no internal pull-up) and should have external
pull-ups if not driven. SO is high-impedance when CSn is high. External pull-up should be used at SO to prevent
floating input at microcontroller or the internal SO-pin pull-up should be enabled.
Ember Part Number: 120-0049-000C
Pin Name
TXRX_SWITCH
RF_N
GND
AVDD_SW
NC
NC
NC
AVDD_RF2
AVDD_IF2
NC
AVDD_ADC
DVDD_ADC
DGND_GUARD
DGUARD
RESETn
DGND
DSUB_PADS
DSUB_CORE
DVDD3.3
DVDD1.8
SFD
CCA
FIFOP
FIFO
CSn
SCLK
SI
SO
DVDD_RAM
NC
AVDD_XOSC16
XOSC16_Q2
XOSC16_Q1
NC
VREG_EN
VREG_OUT
VREG_IN
AVDD_IF1
R_BIAS
ATEST2
ATEST1
AVDD_CHP
Pin type
Power (analog)
RF I/O
Ground (analog)
Power (analog)
-
-
-
Power (analog)
Power (analog)
-
Power (analog)
Power (digital)
Ground (digital)
Power (digital)
Digital Input
Ground (digital)
Ground (digital)
Ground (digital)
Power (digital)
Power (digital)
Digital output
Digital output
Digital output
Digital I/O
Digital input
Digital input
Digital input
Digital output
(tristate / pullup)
Power (digital)
-
Power (analog)
Analog I/O
Analog I/O
-
Digital input
Power output
Power (analog)
Power (analog)
Analog output
Analog I/O
Analog I/O
Power (analog)
EM2420 Datasheet
Common supply connection for integrated RF front-end. Must
Grounded pin for RF shielding
1.8 V Power supply for LNA / PA switch
1.8 V Power supply for receive and transmit mixers
1.8 V Power supply for transmit / receive IF chain
1.8 V Power supply for analog parts of ADCs and DACs
3.3 V Power supply for digital I/Os
1.8 V Power supply for digital core
CCA (Clear Channel Assessment) / digital mux output
High when number of bytes in FIFO exceeds threshold /
High when data in FIFO /
SPI Chip select, active low
SPI Clock input, up to 10 MHz
SPI Slave Input. Sampled on the positive edge of SCLK
1.8 V crystal oscillator power supply
Voltage regulator 1.8 V power supply output
Voltage regulator 2.1 to 3.6 V power supply input
1.8 V Power supply for transmit / receive IF chain
Analog test I/O for prototype and production testing
Analog test I/O for prototype and production testing
1.8 V Power supply for phase detector and charge pump
Pin Description
be connected to RF_P and RF_N externally through a DC
path
Negative RF input/output signal to LNA/from PA in
receive/transmit mode
No Connect
No Connect
No Connect
No Connect
1.8 V Power supply for digital parts of receive ADCs
Ground connection for digital noise isolation
1.8 V Power supply connection for digital noise isolation
Asynchronous, active low digital reset
Ground connection for digital core and pads
Substrate connection for digital pads
Substrate connection for digital modules
SFD (Start of Frame Delimiter) / digital mux output
serial RF clock output in test mode
serial RF data input / output in test mode
SPI Slave Output. Updated on the negative edge of SCLK.
Tristate when CSn high. Programmable internal pullup
1.8 V Power supply for digital RAM
No Connect
16 MHz Crystal oscillator pin 2
16 MHz Crystal oscillator pin 1 or external clock input
No Connect
Voltage regulator enable, active high, held at VREG_IN
voltage level when active
External precision resistor, 43 kΩ, ± 1 %
EM2420
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