收藏本站
71M6545/71M6545H Data Sheet
Table 42: I/O RAM Registers for RTC Interrupts
Name
Location
Rst
Wk
Dir
Description
RTC_TMIN[5:0] 289E[5:0]
0
0
R/W The target minutes register. See below.
RTC_THR[4:0]
289F[4:0]
0
0
The target hours register. The RTC_T interrupt occurs
R/W when RTC_MIN[5:0] becomes equal to RTC_TMIN[5:0]
and RTC_HR[4:0] becomes equal to RTC_THR[4:0] .
2.5.5
71M6545/H Temperature Sensor
???????? ( ℃ ) = 0.325 ? ?????????? + 0.00218 ? ???????????? 2 ? 0.609 ? ???????????? + 64.4
63 ? ??????????
???????? ( ℃ ) =
+ 0.00218 ? ???????????? 2 ? 0.609 ? ???????????? + 64.4
The 71M6545/H includes an on-chip temperature sensor for determining the temperature of its
bandgap reference. The primary use of the temperature data is to determine the magnitude of
compensation required to offset the thermal drift in the system for the compensation of current, voltage
and energy measurement and the RTC. See 4.5 Metrology Temperature Compensation on page 74 . Also
see 2.5.4.4 RTC Temperature Compensation on page 51 .
The temperature sensor can be used to compensate for the frequency variation of the crystal, during ac
power outages, provided the VBAT_RTC voltage is within specification (supplied by a battery). See
2.5.4.4 RTC Temperature Compensation on page 51 .
In MSN mode, the temperature sensor is awakened on command from the MPU by setting the
TEMP_START (I/O RAM 0x28B4[6]) control bit. During power outages and while operating from
VBAT_RTC power, it is awakened at a regular rate set by TEMP_PER[2:0] (I/O RAM 0x28A0[2:0]).
The result of the temperature measurement can be read from the two I/O RAM locations STEMP[10:3]
( I/O RAM 0x2881) and STEMP[2:0] (I/O RAM 0x2882[7:5] ). Note that both of these I/O RAM locations must
be read and properly combined to form the STEMP[10:0] 11-bit value (see STEMP in Table 43 ). The
resulting 11-bit value is in 2’s complement form and ranges from -1024 to +1023 (decimal). The equations
below are used to calculate the sensed temperature from the 11-bit STEMP[10:0] reading.
For the 71M6545 in MSN Mode (with TEMP_PWR = 1):
Temp ( o C ) = 0 . 325 ? STEMP + 22
For the temperature sensors in the 71M6545H:
If STEMP ≤ 0:
If STEMP > 0:
???????? _85
The TEMP_85[10:0] trim fuses are read from the Info Page. See 5.3 Reading the Info Page (71M6545H
only) on page 98 for information on how to read the 71M6545H trim fuses.
Table 43 shows the I/O RAM registers used for temperature and battery measurement.
If TEMP_PWR selects VBAT_RTC when the battery is nearly discharged, the temperature
measurement may not finish. In this case, firmware may complete the measurement by selecting
V3P3D ( TEMP_PWR = 1).
v2
53
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
720-10007-00300 CBL D-SUB 9PIN FMAL-25PIN FML 3M
720-10010-00025 CBL DSUB 9PIN FML-25PIN MAL .25M
720-10020-00300 CBL DSUB 9PIN FML-9PIN MALE 3M
720-10021-00300 CBL DSUB 9PIN FML-9PIN FEMAL 3M
72231-0881 8 POS T/P SHLD 4 GR ASSY
7250B PANEL KIT BOTTOM FOR R-1220 CASE
731-10061-00200 CBL DSUB HD 15FEMAL-15MALE 2.0M
73304-111 MJ HOR ESMT 8/8 H/O T&R
相关代理商/技术参数
71M6545-IGTR/F 功能描述:计量片上系统 - SoC Metrology Proc. (3P 64K Flsh .1%) RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6545T-IGT/F 制造商:Maxim Integrated Products 功能描述:METROLOGY PROCESSORS - Rail/Tube
71M6545T-IGTR/F 制造商:Maxim Integrated Products 功能描述:3-PHASE AFE, 32KB FLASH, PRES TEMP SENSOR - Tape and Reel
71M6601 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
71M6601-IF 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
71M6601-IL 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring
71M6601-IL/F 功能描述:模数转换器 - ADC Isolated Sensor IC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
71M6601-ILF 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring