MRF24J40_08 Datasheet, PDF (9/152 Pages) Microchip Technology – IEEE 802.15.4™ 2.4 GHz RF Transceiver

MRF24J40
2.3 Pin Descriptions
TABLE 2-1: MRF24J40 PIN DESCRIPTIONS
Pin Symbol Type
Description
1
VDD
Power RF power supply. Bypass with a capacitor as close to the pin as possible.
2
RFP
AIO Differential RF input/output (+).
3
RFN
AIO Differential RF input/output (-).
4
VDD
Power RF power supply. Bypass with a capacitor as close to the pin as possible.
5
VDD
Power Guard ring power supply. Bypass with a capacitor as close to the pin as possible.
6
GND
Ground Guard ring ground.
7
GPIO0
DIO General purpose digital I/O, also used as external PA enable.
8
GPIO1
DIO General purpose digital I/O, also used as external TX/RX switch control.
9
GPIO5
DIO General purpose digital I/O.
10
GPIO4
DIO General purpose digital I/O.
11
GPIO2
DIO General purpose digital I/O, also used as external TX/RX switch control.
12
GPIO3
DIO General purpose digital I/O.
13 RESET
DI Global hardware Reset pin active-low.
14
GND
Ground Ground for digital circuit.
15
WAKE
DI External wake-up trigger (must be enabled in software).
16
INT
DO Interrupt pin to microcontroller.
17
SDO
DO Serial interface data output from MRF24J40.
18
SDI
DI Serial interface data input to MRF24J40.
19
SCK
DI Serial interface clock.
20
CS
DI Serial interface enable.
21
VDD
Power Digital circuit power supply. Bypass with a capacitor as close to the pin as possible.
22
GND
Ground Ground for digital circuit.
23
NC
— No Connection.
24
GND
Ground Ground for digital circuit.
25
GND
Ground Ground for digital circuit.
26
NC
— No Connection. (Allow pin to float; do not connect signal.)
27 LPOSC2
AI 32 kHz crystal input.
28 LPOSC1
AI 32 kHz crystal input.
29
NC
— No Connection. (Allow pin to float; do not connect signal.)
30
NC
— No Connection. (Allow pin to float; do not connect signal.)
31
VDD
Power Power supply for band gap reference circuit. Bypass with a capacitor as close to the
pin as possible.
32
VDD
Power Power supply for analog circuit. Bypass with a capacitor as close to the pin as
possible.
33
OSC2
AI 20 MHz crystal input.
34
OSC1
AI 20 MHz crystal input.
35
VDD
Power PLL power supply. Bypass with a capacitor as close to the pin as possible.
36
GND
Ground Ground for PLL.
37
VDD
Power Charge pump power supply. Bypass with a capacitor as close to the pin as possible.
38
NC
— No Connection.
39
VDD
Power VCO supply. Bypass with a capacitor as close to the pin as possible.
40
LCAP
— PLL loop filter external capacitor. Connected to external 100 pF capacitor.
Legend: A = Analog, D = Digital, I = Input, O = Output
© 2008 Microchip Technology Inc.
Preliminary
DS39776B-page 7