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ZED-F9K(七）

2023-07-04 12:34阅读：

http://blog.sina.cn/dpool/blog/u/5192151605

（2）Operating conditions（运行条件）
All specifications are at an ambient temperature of 25 °C. Extreme operating temperatures can significantly impact the specification values. Applications operating near the temperature limits should be tested to ensure the specification.
所有规范规定的环境稳定为25。极端工作温度会对规范值产生显着影响。为了符合规范，测试程序应该在极限温度附近进行测试。
Operating conditions
Parameter
 参数
 Symbol
 Min
 Typical
 Max
 Units
 Condition

Power supply voltage
 电源电压
 VCC
 2.7
 3
 3.6
 V
Backup battery voltage
 备用电池电压
 V_BCKP
 1.65
 3.6
 V
Backup battery current
 备用电池电流
 I_BCKP
 36
 µA
 V_BCKP = 3 V, VCC = 0 V
SW backup current
 SW备用电流
 I_SWBCKP
 1.5
 mA
Input pin voltage range
 输入引脚电压范围
 Vin
 0
 VCC
 V
Digital IO pin low level input voltage
 数字IO引脚低电平输入电压
 Vil
 0.4
 V
Digital IO pin high level input voltage
 数字IO引脚高电平输入电压
 Vih
 0.8 * VCC
 V
Digital IO pin low level output voltage
 数字IO引脚低电平输出电压
 Vol
 0.4
 V
 Iol = 2 mA
Digital IO pin high level output voltage
 数字IO引脚高电平输出电压
 Voh
 VCC – 0.4
 V
 Ioh = 2 mA
VCC_RF voltage
 射频电压
 VCC_RF
 VCC - 0.1
 V
VCC_RF output current
 射频输出电流
 ICC_RF
 50
 mA
Receiver chain noise figure
 接收机链噪声系数
 NFtot
 9.5
 dB
Operating temperature
 工作温度
 Topr
 -40
 25
 85
 °C

Operation beyond the specified operating conditions can affect device reliability.
超出规定操作条件的操作可能会影响设备的可靠性。
（3）Indicative power requirements（指示功率要求）
Following table lists examples of the total system supply current including RF and baseband section for a possible application.
下表列出了可能应用的总系统电源电流示例，包括射频和基带部分。
Values in following table are provided for customer information only, as an example of typical current requirements. Values are characterized on samples by using a command cold start. Actual power requirements can vary depending on FW version used, external circuitry, number of satellites tracked, signal strength, type and time of start, duration, and conditions of test.
下表中的值仅供客户参考，作为典型当前要求的示例。通过使用冷启动命令对样本上的值进行表征。实际功率需求可能因所用FW版本、外部电路、跟踪的卫星数量、信号强度、启动类型和时间、持续时间和测试条件而有所不同。
Currents to calculate the indicative power requirements
Symbol
 Parameter
 参数
 Conditions
 状态
 GPS+GLO+GAL+BDS
 GPS
 Unit
IPEAK
 Peak current
 峰值电流
 Acquisition
 获得
 130
 120
 mA
IVCC
 VCC current
 VCC电流
 Acquisition
 获得
 90
 75
 mA
Isupply
 Supply current
 供电电流
 Tracking
 追踪
 85
 68
 mA

All values in above table are measured at 25 °C ambient temperature.
上表中所有的数值是在25的环境温度中测得的。
（五）Communications interfaces（通讯接口）
There are several communications interfaces including UART, SPI, I2C and USB.
有几种通信接口，包括UART、SPI、I2C和USB。
All the inputs have internal pull-up resistors in normal operation and can be left open if not used. All the PIOs are supplied by VCC, therefore all the voltage levels of the PIO pins are related to VCC supply voltage.
在正常运行状态，所有的输入端都有内部的上拉电阻器，在不使用的状态下，保持开路状态。所有的PIO都由VCC供电，因此PIO引脚的所有电压电平都与VCC供电电压有关。
（1）UART interface（UART接口）
The UART interfaces support configurable baud rates. See the ZED-F9K Integration manual. Hardware flow control is not supported.
UART接口支持可配置的波特率。请参阅ZED-F9K集成手册。不支持硬件流控制。
UART1 is the primary host communications interface while UART2 is dedicated for RTCM 3.3 corrections and NMEA. No UBX protocol is supported on UART 2.
UART1是主要的主机通信接口，而UART2专用于RTCM 3.3修正和NMEA。UART 2上不支持UBX协议。
The UART1 is enabled if D_SEL pin of the module is left open or 'high'.
如果模块的 D_SEL 引脚保持开路或“高”，则启用 UART1。
ZED-F9K UART specifications（ZED-F9K UART规格）
Symbol
 Parameter
 参数
 Min
 Max
 Unit
Ru

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