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| 型号： | 71M6543F-IGT/F |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 封装： | LEAD FREE, LQFP-100 |
| 文件页数： | 76/157页 |
| 文件大小： | 2178K |
| 代理商： | 71M6543F-IGT/F |
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71M6543F/H and 71M6543G/GH Data Sheet
v1.2
2008–2011 Teridian Semiconductor Corporation
25
2.3
Digital Computation Engine (CE)
The CE, a dedicated 32-bit signal processor, performs the precision computations necessary to accurately
measure energy. The CE calculations and processes include:
Multiplication of each current sample with its associated voltage sample to obtain the energy per
sample (when multiplied by the constant sample time).
Frequency-insensitive delay cancellation on all channels (to compensate for the delay between
samples caused by the multiplexing scheme).
90
° phase shifter (for VAR calculations).
Pulse generation.
Monitoring of the input signal frequency (for frequency and phase information).
Monitoring of the input signal amplitude (for sag detection).
Scaling of the processed samples based on calibration coefficients.
Scaling of samples based on temperature compensation information.
2.3.1
CE Program Memory
The CE program resides in flash memory. Common access to flash memory by the CE and MPU is
controlled by a memory share circuit. Each CE instruction word is two bytes long. Allocated flash space
for the CE program cannot exceed 4096 16-bit words (8 KB). The CE program counter begins a pass
through the CE code each time multiplexer state 0 begins. The code pass ends when a HALT instruction
is executed. For proper operation, the code pass must be completed before the multiplexer cycle ends.
The CE program must begin on a 1 KB boundary of the flash address. The I/O RAM control field
CE_LCTN[6/5:0] (I/O RAM 0x2109[6/5:0]) on the 71M6543F/H and CE_LCTN[6:0] (I/O RAM 0x2109[6:0]) on
the 71M6543G/GH defines which 1 KB boundary contains the CE code. Thus, the first CE instruction is
located at 1024*CE_LCTN[5:0] on the 71M6543F/H and 1024*CE_LCTN[6:0] on the 71M6543G/GH.
2.3.2
CE Data Memory
The CE and MPU share data memory (RAM). Common access to XRAM by the CE and MPU is controlled
by a memory share circuit. The CE can access up to 3 KB of the 5 KB data RAM (XRAM), i.e. from RAM
address 0x0000 to 0x0C00.
The XRAM can be accessed by the FIR filter block, the RTM circuit, the CE, and the MPU. Assigned time
slots are reserved for FIR and MPU, respectively, to prevent bus contention for XRAM data access by the CE.
The MPU reads and writes the XRAM shared between the CE and MPU as the primary means of data
communication between the two processors.
The CE is aided by support hardware to facilitate implementation of equations, pulse counters, and
accumulators. This hardware is controlled through I/O RAM field EQU[2:0] (equation assist, I/O RAM
0x2106[7:5]), bit DIO_PV (I/O RAM 0x2457[6]), bit DIO_PW (pulse count assist, I/O RAM 0x2457[7]), and
SUM_SAMPS[12:0] (accumulation assist, I/O RAM 0x2107[4:0] and 0x2108[7:0]).
The integration time for each energy output, when using standard CE code, is SUM_SAMPS[12:0] /2184.53
(with MUX_DIV[3:0] = 7, I/O RAM 0x2100[7:4] ). CE hardware issues the XFER_BUSY interrupt when the
accumulation is complete.
2.3.3
CE Communication with the MPU
The CE outputs six signals to the MPU: CE_BUSY, XFER_BUSY, XPULSE, YPULSE, WPULSE and
VPULSE. These are connected to the MPU interrupt service. CE_BUSY indicates that the CE is actively
processing data. This signal occurs once every multiplexer frame. XFER_BUSY indicates that the CE is
updating to the output region of the CE RAM, which occurs whenever an accumulation cycle has been
completed. Both, CE_BUSY and XFER_BUSY are cleared when the CE executes a HALT instruction.
XPULSE and YPULSE can be configured to interrupt the MPU and indicate sag failures, zero crossings of
the mains voltage, or other significant events. Additionally, these signals can be connected directly to DIO
pins to provide direct outputs from the CE. Interrupts associated with these signals always occur on the
leading edge.
相关PDF资料 |
PDF描述 |
|---|---|
| 71M6543H-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543F-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543H-IGT/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543G-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543GH-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6543F-IGTR/F | 功能描述:计量片上系统 - SoC Precision 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 |
| 71M6543FT-IGT/F | 制造商:Maxim Integrated Products 功能描述:ENERGY METER ICS - Rail/Tube |
| 71M6543FT-IGTR/F | 制造商:Maxim Integrated Products 功能描述:3-PHASE SOC, 64KB FLASH, PRES TEMP SENSOR - Tape and Reel |
| 71M6543G | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation |
| 71M6543GH | 制造商:未知厂家 制造商全称:未知厂家 功能描述:电表IC |
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