参数资料
型号: 71M6521FE-DB
厂商: Maxim Integrated Products
文件页数: 65/107页
文件大小: 0K
描述: BOARD DEMO FOR 71M6521FE
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式:
已用 IC / 零件: 71M6521
已供物品: 2 个板,线缆,CD,电源
71M6521DE/DH/FE Data Sheet
32768.5
32768.4
32768.3
32768.2
32768.1
32768
32767.9
32767.8
32767.7
32767.6
32767.5
crystal
curve fit
inverse curve
-50
-25
0
25
50
Figure 33: Crystal Compensation
The MPU Demo Code supplied with the Teridian Demo Kits has a direct interface for these coefficients and it directly
controls the RTC_DEC_SEC or RTC_INC_SEC registers. The Demo Code uses the coefficients in the form:
CORRECTION ( ppm ) =
Y _ CAL
10
+ T ?
Y _ CALC
100
+ T 2 ?
Y _ CALC 2
1000
Note that the coefficients are scaled by 10, 100, and 1000 to provide more resolution. For our example case, the
coefficients would then become (after rounding):
Y_CAL = 109, Y_CALC = 12, Y_CALC2 = 7
Alternatively, the mains frequency may be used to stabilize or check the function of the RTC. For this purpose, the
CE provides a count of the zero crossings detected for the selected line voltage in the MAIN_EDGE_X address. This
count is equivalent to twice the line frequency, and can be used to synchronize and/or correct the RTC.
Connecting 5 V Devices
All digital input pins of the 71M6521DE/DH/FE are compatible with external 5 V devices. I/O pins configured as inputs
do not require current-limiting resistors when they are connected to external 5 V devices.
Rev 3
Page: 65 of 107
相关PDF资料
PDF描述
71M6531F-DB BOARD DEMO 71M6531F
71M6533-DB BOARD DEMO 71M6533
71M6534H-DB BOARD DEMO 71M6534H
71M6541F-DB DEMO BOARD 71M6541F
71M6543F-DB-CT DEMO BOARD 71M6543F-DB-CT
相关代理商/技术参数
参数描述
71M6521FE-IGT 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Energy Meter IC
71M6521FE-IGT/F 功能描述:计量片上系统 - SoC Residential Energy Meter IC 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
71M6521FE-IGT/F1 功能描述:计量片上系统 - SoC 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
71M6521FE-IGTR 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Energy Meter IC
71M6521FE-IGTR/F 功能描述:计量片上系统 - SoC Residential Energy Meter IC 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