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MRF24J40-IMM Datasheet(PDF) 7 Page - Microchip Technology |
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MRF24J40-IMM Datasheet(HTML) 7 Page - Microchip Technology |
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7 / 66 page  © 2006 Microchip Technology Inc. Advance Information DS39776A-page 5 MRF24J40 1.1 Pin Descriptions TABLE 1-2: MRF24J40 PIN DESCRIPTIONS Pin Symbol Type Description 1VDD 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 (-). 4VDD Power RF power supply. Bypass with a capacitor as close to the pin as possible. 5VDD 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. 16 INT DO Interrupt pin to microcontroller. 17 SDO DIO Serial interface data output from MRF24J40. 18 SDI DIO 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, do not connect anything to this pin. 24 GND Ground Ground for digital circuit. 25 GND Ground Ground for digital circuit. 26 CLKOUT DIO 20/10/5/2.5 MHz clock output. 27 LPOSC2 AI 32 kHz crystal input (-). 28 LPOSC1 AI 32 kHz crystal input (+). 29 RXIP AO Analog RX I channel output (+). 30 RXQP AO Analog RX Q channel output (+). 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 180 pF capacitor. Legend: A = Analog, D = Digital, I = Input, O = Output |
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