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参数资料
| 型号： | 71M6521DE-IGT/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 82/107页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 16K FLASH 64LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 160 |
| 系列： | Single Converter Technology® |
| 测量误差： | 0.4% |
| 电源电压： | 3 V ~ 3.6 V |
| 测量仪表类型： | 单相，双相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 管件 |
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71M6521DE/DH/FE Data Sheet
CE Interface Description
CE Program
The CE program is supplied as a data image that can be merged with the MPU operational code for meter
applications. Typically, the CE program covers most applications and does not need to be modified. For EQU = 0 and
EQU = 1, CE code CE21A04_2 should be used. For EQU = 2, CE code image CE21A03_2 should be used. The
description in this section applies to CE code revision CE21A03_2.
Formats
All CE words are 4 bytes. Unless specified otherwise, they are in 32-bit two’s complement (-1 = 0xFFFFFFFF).
‘Calibration’ parameters are defined in flash memory (or external EEPROM) and must be copied to CE data memory
by the MPU before enabling the CE. ‘Internal’ variables are used in internal CE calculations. ‘Input’ variables allow
the MPU to control the behavior of the CE code. ‘Output’ variables are outputs of the CE calculations. The
corresponding MPU address for the most significant byte is given by 0x1000 + 4 x CE_address and 0x1003 + 4 x
CE_address for the least significant byte.
Constants
Constants used in the CE Data Memory tables are:
?
?
?
?
?
?
F S = 32768Hz/13 = 2520.62Hz.
F 0 is the fundamental frequency.
IMAX is the external rms current corresponding to 250mV pk at the inputs IA and IB.
VMAX is the external rms voltage corresponding to 250mV pk at the VA and VB inputs.
N ACC , the accumulation count for energy measurements is PRE_SAMPS*SUM_CYCLES .
Accumulation count time for energy measurements is PRE_SAMPS*SUM_CYCLES /F S .
The system constants IMAX and VMAX are used by the MPU to convert internal quantities (as used by the CE) to ex-
ternal, i.e. metering quantities. Their values are determined by the off-chip scaling of the voltage and current sensors
used in an actual meter. The LSB values used in this document relate digital quantities at the CE or MPU interface to
external meter input quantities. For example, if a SAG threshold of 80V peak is desired at the meter input, the digital
value that should be programmed into SAG_THR would be 80V/ SAG_THR LSB , where SAG_THR LSB is the LSB value in
the description of SAG_THR .
The parameters EQU , CE_E , PRE_SAMPS, and SUM_CYCLES essential to the function of the CE are stored in I/O RAM
(see I/O RAM section).
Environment
Before starting the CE using the CE_E bit, the MPU has to establish the proper environment for the CE by
implementing the following steps:
? Load the CE data into CE DRAM.
? Establish the equation to be applied in EQU.
? Establish the accumulation period and number of samples in PRE_SAMPS and SUM_CYCLES .
? Establish the number of cycles per ADC mux frame.
? Set PLS_INTERVAL [7:0] to 81.
? Set FIR_LEN to 1 and MUX_DIV to 1.
There must be thirteen 32768Hz cycles per ADC mux frame (see System Timing Diagram, Figure 16). This means
that the product of the number of cycles per frame and the number of conversions per frame must be 12 (allowing for
one settling cycle). The required configuration is FIR_LEN = 1 (three cycles per conversion) and MUX_DIV = 1 (4
conversions per mux frame).
Page: 82 of 107
Rev 3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6521DE-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 |
| 71M6521DE-IGTR/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 |
| 71M6521DE-IM/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 |
| 71M6521DEIM-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6521DE Demo Brd |
| 71M6521DE-IMR/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 |
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