参数资料
| 型号： | 71M6531F-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 88/121页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 71M6531F |
| 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： | 是 |
| 已用 IC / 零件： | 71M6531 |
| 主要属性： | 单相功率表 |
| 已供物品： | 2 个板，线缆，CD，电源 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页当前第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页
Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
4.3
4.3.1
CE Interface Description
CE Program
The CE performs the precision computations necessary to accurately measure energy. Different code
variations are used for EQU[2:0] = 0 and EQU[2:0] = 1 or 2. The computations include offset cancellation,
products, product smoothing, product summation, frequency detection, VAR calculation, sag detection,
peak detection and voltage phase measurement. All data computed by the CE is dependent on the
selected meter equation as given by EQU[2:0] . Although EQU[2:0] = 0 and EQU[2:0] = 2 have the same
element mapping, the MPU code can use the value of EQU[2:0] to decide if element 2 is used for tamper
detection (typically done by connecting VB to VA) or as a second independent element.
The CE program is supplied by Maxim 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. Other variations of CE code may be available from Maxim. The description in this section ap-
plies to CE code revision CE31A04 (for EQU[2:0] = 0). Deviations for code revision CE31A03 (for
EQU[2:0] = 1 or 2) are noted where applicable.
4.3.2
CE Data Format
All CE words are 4 bytes. Unless specified otherwise, they are in 32-bit two’s complement format
(-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 0x0000 + 4 x CE_address and by 0x0003 + 4 x CE_address for the least significant byte.
4.3.3
Constants
Constants used in the CE Data Memory tables are:
Voltage LSB for sag detection = VMAX * 7.8798*10 V.
?
?
?
?
?
?
?
?
?
F S = 32768 Hz/13 = 2520.62 Hz.
F 0 is the fundamental frequency.
IMAX is the external rms current corresponding to 250 mV pk at the inputs IA and IB.
VMAX is the external rms voltage corresponding to 250 mV pk at the VA and VB inputs.
N ACC , the accumulation count for energy measurements is PRE_SAMPS[1:0] * SUM_CYCLES[5:0] .
The duration of the accumulation interval for energy measurements is
PRE_SAMPS[1:0] * SUM_CYCLES[5:0] /F S
ln_8 is a gain constant of the current channel, n. Its value is 8 or 1 and is controlled by In_SHUNT .
X is a gain constant of the pulse generators. Its value is determined by PULSE_FAST and PULSE_SLOW .
-6
The system constants IMAX and VMAX are used by the MPU to convert internal quantities (as used by
the CE) to external, 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 80 V peak is desired at the meter input, the digital value that should be programmed into SAG_THR
would be 80/ SAG_THR LSB , where SAG_THR LSB is the LSB value in the description of SAG_THR .
The parameters EQU[2:0], CE_E, PRE_SAMPS[1:0] and SUM_CYCLES[5:0] essential to the function of the
CE are stored in I/O RAM (see Section 4.2 I/O RAM Description – Alphabetical Order ).
4.3.4
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 (for CE31A04 code):
?
?
?
?
?
88
Load the CE data into RAM.
Establish the equation to be applied in EQU[2:0] . The CE code has to match the selected equation.
Establish the accumulation period and number of samples in PRE_SAMPS[1:0] = 0 (multiplier = 42) and
SUM_CYCLES[5:0] = 0x3C (60).
Set PLS_INTERVAL [7:0] to 81.
Select the values for FIR_LEN[1:0] = 2 and MUX_DIV[3:0] = 4.
Rev 2
相关PDF资料 |
PDF描述 |
|---|---|
| 71M6533-DB | BOARD DEMO 71M6533 |
| 71M6534H-DB | BOARD DEMO 71M6534H |
| 71M6541F-DB | DEMO BOARD 71M6541F |
| 71M6543F-DB-CT | DEMO BOARD 71M6543F-DB-CT |
| 72-CNV-5 | CONVERTER RS-232 TO RS-422 5V |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6531F-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 |
| 71M6531F-IM/F3 | 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 |
| 71M6531F-IM/F4 | 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 |
| 71M6531F-IM/FR4 | 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 |
| 71M6531F-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 |
发布紧急采购，3分钟左右您将得到回复。