参数资料
型号: SX1212IWLTRT
厂商: Semtech
文件页数: 47/77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
5.4.5. uC Connections
SX1212
IRQ_0
IRQ_1
NSS_CONFIG
uC
NSS_DATA
SCK
MOSI
MISO
Figure 41: uC Connections in Buffered Mode
Note that depending upon the application, some uC connections may not be needed:
IRQ_0: if none of the relevant IRQ sources are used. In this case, leave floating.
IRQ_1: if none of the relevant IRQ sources are used. In this case, leave floating.
MISO: if no read register access is needed and the chip is used in Tx mode only. In this case, pull up to VDD
through a 100 k ? resistor.
In addition, DATA pin (unused in buffered mode) should be pulled-up to VDD through a 100 k ? resistor.
Please refer to Table 13 for the SX1212’s pin configuration.
5.4.6. Buffered Mode Example
Configure all data processing related registers listed below appropriately. In this example we assume Sync
word recognition is on and Fifo_fill_method=0.
Tx
Rx
Description
Data_mode_x
X
X
Defines data operation mode ( Buffered)
MCParam
IRQParam
Fifo_size
Fifo_thresh
Rx_stby_irq_0
Rx_stby_irq_1
Tx_irq_1
Fifo_fill_method
X
X
X
X
X
X
X
X
Defines FIFO size
Defines FIFO threshold
Defines IRQ_0 source in Rx & Stby modes
Defines IRQ_1 source in Rx & Stby modes
Defines IRQ_1 source in Tx mode
Defines FIFO filling method
Fifo_fill
Tx_start_irq_0
X
X
Controls FIFO filling status
Defines Tx start condition and IRQ_0 source
RXParam
SYNCParam
Sync_size
Sync_tol
Sync_value
X
X
X
Defines Sync word size
Defines the error tolerance on Sync word detection
Defines Sync word value
Table 22: Relevant Configuration Registers in Buffered Mode (data processing related only)
Tx Mode:
Program Tx start condition and IRQs: Start Tx when FIFO is not empty (Tx_start_irq_0=1) and IRQ_1 mapped
to Tx_done (Tx_irq_1=1)
Go to Tx mode (and wait for Tx to be ready, see Figure 50)
Rev 2 – June 18th, 2009
Page 47 of 77
www.semtech.com
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