MSP430FR2110IPW16使用内部RTC时钟时钟源,功耗17uA,进不了低功耗模式。外接32.768kHz晶振,功耗才降下来到1uA。产品不能外接晶振,计划换芯片,请问MSP430FR2110IPW16是否有其他系列低功耗芯片可替代,最好封装一样,请推荐。
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MSP430FR2110IPW16使用内部RTC时钟时钟源,功耗17uA,进不了低功耗模式。外接32.768kHz晶振,功耗才降下来到1uA。产品不能外接晶振,计划换芯片,请问MSP430FR2110IPW16是否有其他系列低功耗芯片可替代,最好封装一样,请推荐。
兄台,你好
我也是用的MSP430FR2111IPW16,跟你遇到同一个功耗问题。在使用LPM3内部ACLK时,功耗总是17uA降不下,现在问题解决了。
我的解决方式如下:
MCU休眠时,设置为LPM4,然后RTC定时器选择VLOCLK作为时钟源,现在整机功耗为0.65uA~1.75uA;
RTC设置如下:
void Init_TRC_Mode()
{
// RTC count re-load compare value at 32.
// 1024/32768 * 32 = 1 sec.
RTCMOD = 64-1;
RTCCTL = RTCSS__VLOCLK | RTCSR | RTCPS__1024 | RTCIE;
}
The internal VLO provides a typical frequency of 10 kHz (see the device-specific data sheet for
parameters) without requiring a crystal. The VLO provides for a low-cost low-power clock source for
applications that do not require an accurate time base.
VLOCLK is active in the following conditions:
• VLO is selected as the source of MCLK and SMCLK (SELMS = {3}), and MCLK or SMCLK is active.
• The VLOAUTOOFF bit is cleared and the MCU is in AM through LPM4.
• At least one peripheral requests VLO as clock source.
希望能够帮助到你。
顺祝
商祺