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| 型号： | 71M6515H-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 35/66页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 71M6515H ENERGY METER |
| 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： | 否 |
| 已用 IC / 零件： | 71M6515H |
| 已供物品： | 2 个板，线缆，CD，电源 |
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71M6515H Demo Board User’s Manual
2.2
2.2.1
SCHEMATIC INFORMATION
In this section, hints on proper schematic design are provided that will help designing circuits that are
functional and sufficiently immune to EMI (electromagnetic interference).
COMPONENTS FOR THE VFLT PIN
The VFLT pin (pin 59) of the 71M6515H must never be left unconnected.
A voltage divider should be used to establish that the voltage at VFLT is in a safe range when the meter is in
mission mode (see Figure 2-6). VFLT must be lower than 2.9V in all cases in order to keep the hardware
watchdog timer enabled.
R83
V3P3
10K
L12
VFLT
D11
UCLAMP3301D
C20
10uF
R86
21.5K
FERRITE
C41
0.1uF
C42
1000pF
GND
Figure 2-6: Voltage Divider for VFLT
2.2.2
RESET CIRCUIT
Even though a functional meter will not necessarily need a reset switch, the 71M6515H Demo Boards
provide a reset pushbutton (SW2) that can be used when prototyping and debugging software. When a
circuit is used in an EMI environment, the RESETZ pin should be supported by the external components
shown in Figure 2-7. R 75 should be in the range of 200 ? , R 77 should be around 10 ? . The capacitor C 38
should be 1000pF. R 75 and C 38 should be mounted as close as possible to the IC. In cases where the trace
from the pushbutton switch to the RESETZ pin poses an EMI problem, R 77 can be removed.
V3P3
SW2
PB-SW
R77
10
C18
NC
R75
200
RESETZ
C38
1000pF
GND
Figure 2-7: External Components for RESETZ
2.2.3
OSCILLATOR
The oscillator of the 71M6515H drives a standard 32.768kHz watch crystal (see Figure 2-8). Crystals of this
type are accurate and do not require a high current oscillator circuit. The oscillator in the 71M6515H has
been designed specifically to handle watch crystals and is compatible with their high impedance and limited
power handling capability. The oscillator power dissipation is very low to maximize the lifetime of any battery
backup device attached to the VBAT pin.
Revision 2.0
? Copyright 2005 TERIDIAN Semiconductor Corporation
35 of 66
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6515H-IGT | 制造商:Maxim Integrated Products 功能描述:METERING FRONT END - Rail/Tube |
| 71M6515H-IGT/F | 功能描述:计量片上系统 - SoC 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 |
| 71M6515H-IGTR | 制造商:Maxim Integrated Products 功能描述:71M6515H-IGT - T/REEL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Energy Meter IC |
| 71M6515H-IGTR/F | 功能描述:计量片上系统 - SoC 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 |
| 71M6515H-IGTW/F | 功能描述:计量片上系统 - SoC 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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