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| 型号： | MC13224VR2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA99 |
| 封装： | 9.50 X 9.50 MM, 1.20 MM HEIGHT, ROHS COMPLIANT, LGA-99 |
| 文件页数： | 6/54页 |
| 文件大小： | 490K |
| 代理商： | MC13224VR2 |
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MC1322x Technical Data, Rev. 1.3
14
Freescale Semiconductor
3.3.2.2
CRM Operation
The CRM has primary control of the entire system:
Reset and power up — After release of the hardware RESETB signal, the CRM will perform a
power up sequence of the MCU. The linear regulators and clock sources are managed for a graceful
start-up of the MCU and its resources. The radio is not powered until needed
Normal operation of MCU — The clock management of the MCU and its resources are controlled
by the CRM. The processor clock is programmable from low frequencies up to the maximum
reference frequency (13-26 MHz optional w/24 MHz standard) to allow the application to trade-off
processing speed versus power savings
Sleep modes and recovery — There are two sleep modes of Hibernate and Doze. The primary
difference is that Doze mode keeps the reference oscillator running. Both modes can retain critical
programmed parameters and have selectable sizes of RAM retention. Hibernate has lowest power,
but Doze allows high accuracy sleep timing. The CRM manages the recovery from low power,
similar to power-up from reset, providing regulator and clock management.
— Wake-up can be based on external interrupts through 4 KBI inputs
— Wake-up can be from internal interrupts
— Wake-up can be based on an RTI (wake-up) timer.
The RTI timer has two possible frequency sources that provide a very low power wake-up option
from sleep
— One option is an onboard, low accuracy 2 kHz oscillator
— A second option is to add an external 32.768 kHz crystal for the RTI clock source
— A 32-bit timer allows greater than a 36.4 hour wake-up delay with the 32.768 crystal oscillator
Other features of the CRM:
— An optional COP watchdog timer to monitor CPU program activity
— A programmable software reset
3.3.3
Optional Buck Regulator
For battery based applications, an optional buck regulator is provided to maximize battery life. Figure 4
shows the configuration of the buck regulator versus the normal connection. An onboard MOSFET is used
as a switch with an external 100
μH inductor and 10μF capacitor when the buck regulator is enabled.
The buck regulator drops the higher battery voltage to 1.8 - 2.0 Vdc that is applied to the onboard linear
regulators. This allows lower net current from the battery to maximize the life of the battery.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC13224VR2 | 制造商:Freescale Semiconductor 功能描述:IC 32BIT MCU ARM7 26MHZ LGA-99 |
| MC13224VR2-CUT TAPE | 制造商:Freescale 功能描述:MC13224 Series 2.4 GHz PIP 250 KBps Surface Mount RF Transceiver - LGA-99 |
| MC13226V | 功能描述:射频收发器 Kaibab PRO ROM SE 1.0 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 |
| MC13226VR2 | 功能描述:射频收发器 Kaibab PRO ROM SE 1.0 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 |
| MC1322X | 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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