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| 型号： | DP1283C915 |
| 厂商： | Semtech |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | MODULE DROP IN FOR XE1283 915MHZ |
| 标准包装： | 200 |
| 频率： | 915MHz |
| 数据传输率 - 最大： | 153.2kbps |
| 应用： | ISM |
| 功率 - 输出： | 11dBm |
| 灵敏度： | -111dBm |
| 电源电压： | 2.4 V ~ 3.6 V |
| 电流 - 接收： | 14mA |
| 电流 - 传输： | 40mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 模块 |
| 包装： | 散装 |
DP1283
4.1 STANDARD SEQUENCE FOR SWITCHING BETWEEN RECEIVER AND TRANSMITTER
The drop-in module DP1283 can be programmed using the 3-wire bus or the pin SWITCH. This section describes the
switching sequence from Mode 1 to Mode 2.
Switching sequence using the 3-wire bus
Switch_ext = 0 (Bit 3, Address 00010)
Switching sequence using pad SWITCH
Switch_ext = 1 (Bit 3, Address 00010)
4.2 MICROCONTROLLER CLOCK
In most applications, the CPU clock will be given by the on-chip RC oscillator combined with the pre-mounted 32 kHz
oscillator for calibration (connected between pins XIN and XOUT).
For specific applications where an external clock is required, the 32 kHz crystal has to be removed and the external
CPU clock signal can be injected on XIN pin.
4.3 ANTENNA SWITCH
In both cases the Antenna switch embedded on the DP1283 is by default driven by the microcontroller through PB4 and
PB5.
Truth Table:
PB4 PB5
1 0 Receiver mode
0 1 Transmitter mode
However, it is possible to drive the antenna switch externally via RX and TX pins. In this case, two resistors have to be
moved as explained on the following table:
Switch driven internally (PB4 & PB5)
Switch driven externally (RX & TX pins)
R4, R5
R1, R3
? Semtech 2005
0 ?
NC
9
NC
0 ?
www.semtech.com
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