cần hỏi một chút về con MRF24J40MB

[ntbttd]

// EasyBee3 connections
sbit CS at RA0_bit; //CS pin
sbit RST at RA1_bit; //RST pin
sbit INT at RA2_bit; //INT pin
sbit WAKE at RA3_bit; //WAKE pin

sbit CS_Direction at TRISA0_bit; //CS pin direction
sbit RST_Direction at TRISA1_bit; //RST pin direction
sbit INT_Direction at TRISA2_bit; //INT pin direction
sbit WAKE_Direction at TRISA3_bit; //WAKE pin direction