- 您现在的位置：买卖IC网 > PDF目录20617 > 71M6521BE-IGT/F (Maxim Integrated)IC ENERGY METER 8K FLASH 64-LQFP PDF资料下载
参数资料
| 型号： | 71M6521BE-IGT/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 37/97页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 8K FLASH 64-LQFP |
| 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： | 托盘 |
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页当前第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
71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
On-Chip Resources
Oscillator
The 71M6521BE oscillator drives a standard 32.768kHz watch crystal. These crystals are accurate and do not require a high-
current oscillator circuit. The 71M6521BE oscillator has been designed specifically to handle these crystals and is compatible
with their high impedance and limited power handling capability.
PLL and Internal Clocks
Timing for the device is derived from the 32.768kHz oscillator output. On-chip timing functions include the MPU master clock
and the delta-sigma sample clock. In addition, the MPU has two general counter/timers (see MPU section).
The ADC master clock, CKADC, is generated by an on-chip PLL. It multiplies the oscillator output frequency (CK32) by 150.
The CE clock frequency is always CK32 * 150, or 4.9152MHz, where CK32 is the 32kHz clock. The MPU clock frequency is
determined by MPU_DIV and can be 4.9152MHz *2 - MPU_DIV Hz where MPU_DIV varies from 0 to 7 ( MPU_DIV is 0 on power-
up). This makes the MPU clock scalable from 4.9152MHz down to 38.4kHz. The circuit also generates a 2x MPU clock for use
by the emulator. This clock is not generated when ECK_DIS is asserted by the MPU.
The setting of MPU_DIV is maintained when the device transitions to BROWNOUT mode, but the time base in BROWNOUT
mode is 28,672Hz.
Temperature Sensor
The device includes an on-chip temperature sensor for determining the temperature of the bandgap reference. The MPU may
request an alternate multiplexer frame containing the temperature sensor output by asserting MUX_ALT . The primary use of
the temperature data is to determine the magnitude of compensation required to offset the thermal drift in the system (see
section titled “Temperature Compensation”).
Physical Memory
Flash Memory: The 71M6521 includes 8KB of on-chip flash memory. The flash memory primarily contains MPU and CE
program code. It also contains images of the CE DRAM, MPU RAM, and I/O RAM. On power-up, before enabling the CE, the
MPU copies these images to their respective locations.
Allocated flash space for the CE program cannot exceed 1024 words (2KB). The CE program must begin on a 1KB boundary
of the flash address. The CE_LCTN[4:0] word defines which 1KB boundary contains the CE code. Thus, the first CE instruction
is located at 1024* CE_LCTN[4:0] . The CE_LCTN[4:0] register must be set before the CE is enabled.
The flash memory is segmented into 512 byte individually erasable pages.
The CE engine cannot access its program memory when flash write occurs. Thus, the flash write procedure is to begin a
sequence of flash writes when CE_BUSY falls (CE_BUSY interrupt) and to make sure there is sufficient time to complete the
sequence before CE_BUSY rises again. The actual time for the flash write operation will depend on the exact number of cycles
required by the CE program. Typically (CE program is 512 instructions, mux frame is 13 CK32 cycles), there will be 200μs of
flash write time, enough for 4 bytes of flash write. If the CE code is shorter, there will be even more time.
Two interrupts warn of collisions between the 8051 firmware and the CE timing. If a flash write is attempted while the CE is
busy, the flash write will not execute and the FW_COL0 interrupt will be issued. If a flash write is still in progress when the CE
would otherwise begin a code pass, the code pass is skipped, the write is completed, and the FW_COL1 interrupt is issued.
The bit FLASH66Z (see I/O RAM table) defines the speed for accessing flash memory. To minimize supply current draw, this bit
should be set to 1.
Flash erasure is initiated by writing a specific data pattern to specific SFR registers in the proper sequence. These special
pattern/sequence requirements prevent inadvertent erasure of the flash memory.
V1.0
? 2005-2008 TERIDIAN Semiconductor Corporation
Page: 37 of 97
相关PDF资料 |
PDF描述 |
|---|---|
| ABC44DRES | CONN EDGECARD 88POS .100 EYELET |
| RS3-4809SZ | CONV DC/DC 3W 20-60VIN 09VOUT |
| VI-BNK-EU-F1 | CONVERTER MOD DC/DC 40V 200W |
| 78M6610+PSU/B00 | IC ENERGY MEASURMENT 1PH 24TQFN |
| ACB65DHLT | CONN EDGECARD 130PS .050 DIP SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6521BE-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 |
| 71M6521BE-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 | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Energy Meter IC |
| 71M6521DE-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6521DE Demo Brd |
| 71M6521DE-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 |
发布紧急采购，3分钟左右您将得到回复。