參數(shù)資料
型號(hào)： EM2420TR
廠商： Electronic Theatre Controls, Inc.
英文描述： 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
中文描述： 2.4 GHz IEEE 802.15.4標(biāo)準(zhǔn)/ ZigBee的射頻收發(fā)器
文件頁數(shù)： 15/89頁
文件大?。?/td> 1758K
代理商： EM2420TR
EM2420
Ember Part Number: 120-0049-000
C
EM2420 Datasheet
Page 15 of 89
Pin
Pin Name
TXRX_SWITCH
Pin type
Pin Description
7
Power (analog)
Common supply connection for integrated RF front-end. Must
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
Grounded pin for RF shielding
1.8 V Power supply for LNA / PA switch
No Connect
No Connect
No Connect
1.8 V Power supply for receive and transmit mixers
1.8 V Power supply for transmit / receive IF chain
No Connect
1.8 V Power supply for analog parts of ADCs and DACs
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
3.3 V Power supply for digital I/Os
1.8 V Power supply for digital core
SFD (Start of Frame Delimiter) / digital mux output
CCA (Clear Channel Assessment) / digital mux output
High when number of bytes in FIFO exceeds threshold /
serial RF clock output in test mode
High when data in FIFO /
serial RF data input / output in test mode
SPI Chip select, active low
SPI Clock input, up to 10 MHz
SPI Slave Input. Sampled on the positive edge of SCLK
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
1.8 V crystal oscillator power supply
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
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
External precision resistor, 43 k
,
±
1 %
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
8
RF_N
RF I/O
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
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
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
30
FIFO
Digital I/O
31
32
33
34
CSn
SCLK
SI
SO
Digital input
Digital input
Digital input
Digital output
(tristate / pullup)
Power (digital)
-
Power (analog)
Analog I/O
Analog I/O
-
Digital input
35
36
37
38
39
40
41
DVDD_RAM
NC
AVDD_XOSC16
XOSC16_Q2
XOSC16_Q1
NC
VREG_EN
42
43
44
45
46
47
48
VREG_OUT
VREG_IN
AVDD_IF1
R_BIAS
ATEST2
ATEST1
AVDD_CHP
Power output
Power (analog)
Power (analog)
Analog output
Analog I/O
Analog I/O
Power (analog)
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.
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