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参数资料
| 型号： | MC13214R2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, BGA71 |
| 封装： | 9 X 9 MM, 1 MM HEIGHT, ROHS COMPLIANT, LGA-71 |
| 文件页数： | 16/70页 |
| 文件大小： | 802K |
| 代理商： | MC13214R2 |
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MC13211/212/213/214 Technical Data, Rev. 0.0,
Freescale Semiconductor
23
Figure 13. Crystal Frequency Variation vs. xtal_trim[7:0]
Figure 13 shows typical oscillator frequency decrease versus the value programmed in xtal_trim[7:0].
4.8
Radio Usage
The MC1321x RF analog interface has been designed to provide maximum flexibility as well as low
external part count and cost. An on-chip transmit/receive (T/R) switch with bias switch (CT_Bias) can be
used for a simple single antenna interface with a balun. Alternately, separate full differential RFIN and
PAO outputs can be utilized for separate RX and TX antennae or external LNA and PA designs.
Figure 14 shows three possible configurations for the transceiver radio RF usage.
1. Figure 14A shows a single antenna configuration in which the MC1321x internal T/R switch is
used. The balun converts the single-ended antenna to differential signals that interface to the
RFIN_x (PAO_x) pins of the radio. The CT_Bias pin provides the proper bias point to the balun
depending on operation, that is, CT_Bias is at VDDA voltage for transmit and is at ground for
receive. The internal T/R switch enables the signal to an onboard LNA for receive and enables the
onboard PAs for transmit.
2. Figure 14B shows a single antenna configuration with an external low noise amplifier (LNA) for
greater range. An external antenna switch is used to multiplex the antenna between receive and
transmit. An LNA is in the receive path to add gain for greater receive sensitivity. Two external
baluns are required to convert the single-ended antenna switch signals to the differential signals
required by the radio. Separate RFIN and PAO signals are provided for connection with the baluns,
and the CT_Bias signal is programmed to provide the external switch control. The polarity of the
external switch control is selectable.
-900
-800
-700
-600
-500
-400
-300
-200
-100
0
50
100
150
200
250
300
xtal_trim[7:0] (decimal)
Frequency
Decrease
(Hz)
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| MC1321X | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述: |
| MC1321X_09 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ZigBee?- Compliant Platform - 2.4 GHz Low Power Transceiver for the IEEE? 802.15.4 Standard plus Microcontroller |
| MC13224V | 功能描述:射频收发器 PIP 802.15.4 2.4G IND RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray |
| MC13224V | 制造商:Freescale Semiconductor 功能描述:; Controller Family/Series:(ARM7); Memor |
| MC13224V_09 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Advanced ZigBee?- Compliant Platform-in-Package (PiP) for the 2.4 GHz IEEE? 802.15.4 Standard |
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