英译汉 急（人工翻译） 希望大家能帮帮忙!谢谢!（6）

英译汉 急（人工翻译） 希望大家能帮帮忙!谢谢!（6）
Main Board Analog / Digital Input Ports
Seven ports on the IntelliBrain main board provide for Analog-to-Digital conversion (see Figure 7 - Ports and Pin Arrangement). All seven ports may also be used as digital inputs. All seven ports have a software controlled pull-up resistor built into the ATmega128 chip. When you sample an analog port it will return a value between 0 and 1023, proportional on the voltage (05 volts) on the signal pin (pin 3).
Analog Ports 1 - 2
Analog ports 1-2 include a .1 uF capacitor on the signal line for noise filtering that is particularly useful when interfacing with Sharp infrared range sensors such as the GP2D12. Sensors should be connected to these ports as shown in Figure-6 - Typical Sensor / Effector Connection.