普中51-单核-A5(V5.5)开发板原理图.pdf,1 2 3 4 5 6 WIFI/蓝牙接口 NRF24L01接口 J44 RP25 J45 P5 1 SPI1_MISO 1 8 P2 NRF_IRQ 2 7 BLUE_TXD BLUE_TXD 2 IRQ MISO 4 URXD VCC D3.3V SPI1_MOSI 3 6 R14 470R SPI1_SCK BLUE_RXD BT_STATE 3 MOSI SCK 3 GPIO0 GPIO 16 NRF_CS 4