1 OVERVIEW
1.1 DWM1000 Functional Description
The module contains an on-board 38.4 MHz reference crystal. The crystal has been trimmed in production to
reduce the initial frequency error to approximately 2 ppm, using the DW1000 IC’s internal on-chip crystal trimming
circuit, see section 2.1.1.
使用DW1000集成电路的内部片上晶体微调，在生产中对晶体进行了微调，以将初始频率误差降低到大约2ppm
Always-On (AON) memory can be used to retain DWM1000 configuration data during the lowest power operational
states when the on-chip voltage regulators are disabled. This data is uploaded and downloaded automatically. Use
of DWM1000 AON memory is configurable.
AON寄存器用于低功耗时保存DWM1000的配置消息
The on-chip voltage and temperature monitors allow the host to read the voltage on the VDDAON pin
主机可以读取芯片的温度和电压
1.4 General Purpose Input Output (GPIO)
On reset, all GPIO pins default to input. GPIO inputs, when appropriately configured, are capable of generating
interrupts to the host processor via the IRQ signal.
所有GPIO初始化默认为输入
1.7 Interrupts and Device Status DWM1000 has a number of interrupt events that can be configured to drive the IRQ output pin. The default IRQ pin polarity is active high.
默认中断引脚是高有效
2.1.2 Transmitter Calibration
In order to maximise range, DWM1000 transmit power spectral density (PSD) should be set to the maximum
allowable for the geographic region in which it will be used. For most regions this is -41.3 dBm/MHz.
为了使距离最大化，DWM1000发射功率谱密度（PSD）应设置为使用该密度的地理区域所允许的最大值。对于大多数地区来说，这是-41.3dbm/MHz。
2.1.3 Antenna Delay Calibration
In order to measure range accurately, precise calculation of timestamps is required. To do this the antenna delay
must be known. The DWM1000 allows this delay to be calibrated and provides the facility to compensate for
delays introduced by PCB, external components, antenna and internal DWM1000 delays.
DWM1000允许校准此延迟，并提供补偿设施由PCB、外部元件、天线和内部DWM1000延迟引入的延迟。