参数资料
型号: SX1212IWLTRT
厂商: Semtech
文件页数: 72/77页
文件大小: 0K
描述: IC TXRX 300MHZ-510MHZ 32-TQFN
标准包装: 1
频率: 300MHz ~ 510MHz
数据传输率 - 最大: 150kbps
调制或协议: FSK,OOK
应用: AMR,ISM,家庭自动化,程序控制
功率 - 输出: 12.5dBm
灵敏度: -110dBm
电源电压: 2.1 V ~ 3.6 V
电流 - 接收: 3mA
电流 - 传输: 25mA
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: 32-TQFN
包装: 标准包装
产品目录页面: 584 (CN2011-ZH PDF)
其它名称: SX1212IWLDKR
SX1212
ADVANCED COMMUNICATIONS & SENSING
7.4. Reset of the Chip
A power-on reset of the SX1212 is triggered at power up. Additionally, a manual reset can be issued by controlling
pin 13.
7.4.1. POR
If the application requires the disconnection of VDD from the SX1212, despite of the extremely low Sleep Mode
current, the user should wait for 10 ms from of the end of the POR cycle before commencing communications over
the SPI bus. Pin 13 (TEST8) should be left floating during the POR sequence.
VDD
Pin 13
(output)
Undefined
Wait for
10 ms
Chip is ready from
this point on
Figure 54: POR Timing Diagram
Please note that any CLKOUT activity can also be used to detect that the chip is ready.
7.4.2. Manual Reset
A manual reset of the SX1212 is possible even for applications in which VDD cannot be physically disconnected.
Pin 13 should be pulled high for a hundred microseconds, and then released. The user should then wait for 5 ms
before using the chip.
VDD
> 100 us
Wait for
5 ms
Chip is ready from
this point on
Pin 13
(input)
High-Z
’’1’’
High-Z
Figure 55: Manual Reset Timing Diagram
Please note that while pin 13 is driven high, an over current consumption of up to ten milliamps can be seen on
VDD.
Rev 2 – June 18th, 2009
Page 72 of 77
www.semtech.com
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