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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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MRF24J40T-I/ML bảng dữ liệu(PDF) 9 Page - Microchip Technology |
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MRF24J40T-I/ML bảng dữ liệu(HTML) 9 Page - Microchip Technology |
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9 / 152 page  © 2008 Microchip Technology Inc. Preliminary DS39776B-page 7 MRF24J40 2.3 Pin Descriptions TABLE 2-1: 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 (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 |
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