CXEP2331A 整个系统采用32kHz的晶体时基，并为RAM和RTC提供内部电池备份支持，进一步降低了系统成本。该集成电路支持2线、3线和4线单相和双相住宅计量以及篡改检测机制。CXEP2331为两个电流通道和两个单端电压输入提供单端输入。CXEP2331有两个差分电流输入和三个单端电压输入。CXEP2331/32是高度集成的SoC设备，具有MPU核、RTC、闪存和LCD驱动器。专利的单转换器技术具有22位delta-sigma ADC、4个模拟输入、数字温度补偿、精确电压基准、电池电压监视器和32位计算引擎（CE），支持多种住宅计量应用，很少有低成本的外部组件。最大的设计灵活性是由多个UART、I2C，多达21个DIO管脚和系统内可编程闪存，可在运行中使用数据或应用程序代码进行更新。一整套ICE和开发工具、编程库和参考设计使符合全球电力计量标准的分时、自动抄表和预付费电表得以快速开发和认证。
在2000:1电流范围内，Wh精度<0.1%
超过IEC62053/ANSI C12.20标准
四个传感器输入
低抖动Wh和VARh加上两个附加脉冲测试输出（总共4个，最大10 kHz），脉冲计数
四象限计量
篡改检测（CT、Rogowski或分路中性电流、磁篡改输入）
RTC的线路频率计数
数字温度补偿
相位A和B的弧垂检测
独立的32位计算引擎
具有相同校准的46-64 Hz线频率范围。相位补偿（7度）
三种电池模式，带计时器或按钮唤醒：无电模式（52μA典型）、LCD模式（21μA典型、DAC激活）睡眠模式（0.7μA典型）
电网断电时的能量显示
在3.3 V、MPU时钟频率614 kHz时，39 mW典型功耗
具有3360 Hz或2520 Hz采样率的22位增量西格玛ADC
·8位MPU（80515），每条指令1个时钟周期，最大10 MHz，带集成ICE进行调试
带时钟速率调整寄存器的TOU功能的RTC
硬件看门狗定时器、电源故障监视器
带4个公共段驱动程序的LCD驱动程序：高达156（CXEP2331A/B）或268像素（CXEP2331A/B）
最多22个（CXEP2331A/B）或43个（CXEP2331A/B）通用I/O引脚。与5 V输入兼容的数字I/O引脚
32 kHz时基
高速从SPI接口到数据RAM
两个用于IR和AMR的uart，带调制的IR驱动器
带安全和系统内程序更新的闪存：128 KB（CXEP2331A/32A）256 KB（CXEP2331B/32B）
4kb微处理器x内存
工业温度范围
用于CXEP2331A/B的68针QFN封装可兼容，用于CXEP2331A/B的100针LQFP封装，无铅
[ CXEP2331A ]
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产品概述 返回TOP
产品特点 返回TOP
Wh accuracy < 0.1% over 2000:1 current range
Exceeds IEC62053/ANSI C12.20 standards
Four sensor inputs
Low-jitter Wh and VARh plus two additional pulse test outputs (4 total, 10 kHz maximum) with pulse count
Four-quadrant metering
Tamper detection (Neutral current with CT, Rogowski or shunt, magnetic tamper input)
Line frequency count for RTC
Digital temperature compensation
Sag detection for phase A and B
Independent 32-bit compute engine
46-64 Hz line frequency range with same calibration. Phase compensation ( 7)
Three battery modes with wake-up on timer or push-button: BROWNOUT Mode (52 μA typ.) LCD Mode (21 μA typ., DAC active) SLEEP Mode (0.7 μA typ.)
Energy display during mains power failure
39 mW typical consumption @ 3.3 V, MPU clock frequency 614 kHz
22-bit delta-sigma ADC with 3360 Hz or 2520 Hz sample rate
8-bit MPU (80515),1 clock cycle per instruction, 10 MHz maximum, with integrated ICE for debug
RTC for TOU functions with clock-rate adjust register
Hardware watchdog timer, power fail monitor
LCD driver with 4 common segment drivers: Up to 156 (CXEP2331A/B) or 268 pixels (CXEP2331A/B)
Up to 22 (CXEP2331A/B) or 43 (CXEP2331A/B) general-purpose I/O pins. Digital I/O pins compatible with 5 V inputs
32 kHz time base
High-speed slave SPI interface to data RAM
Two UARTs for IR and AMR, IR driver with modulation
FLASH memory with security and in-system program update: 128 KB (CXEP2331A/32A) 256 KB (CXEP2331B/32B)
4 KB MPU XRAM
Industrial temperature range
68-pin QFN package for CXEP2331A/B pincompatible , 100-pin LQFP package for CXEP2331A/B, lead free
应用范围 返回TOP
High-End Residential Meters, AMR/AMI, and TOU
Industrial, Commercial, and Grid Meters
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Electricity Metering ICs |
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|
Part Number |
Phase |
Internal Flash(KB) |
Internal RAM(KB) |
Analog Input |
Sensor Inputs (Current+Voltage) |
MCU MIPS |
RTC |
LCD Driver Pixels(max) |
GPIO |
UARTs |
|
3P |
||||||||||
|
3P |
||||||||||
|
1P |
||||||||||
|
3P |
||||||||||
|
1P |
64 |
7 |
Singleend |
2SE + 1 |
5 |
Yes |
128 (32x4) |
12 |
2 |
|
|
1P |
64 |
7 |
Singleend |
2SE + 1 |
5 |
Yes |
128 (32x4) |
12 |
2 |
|
|
3P |
64 |
7 |
Singleend |
3SE + 3 |
5 |
Yes |
168 (42x4) |
22 |
2 |
|
|
3P |
64 |
7 |
Singleend |
3SE + 3 |
5 |
Yes |
168 (42x4) |
22 |
2 |
|
|
3P |
64 |
7 |
Singleend |
3SE + 3 |
5 |
Yes |
8 |
1 |
||
|
1P/2P |
128 |
4 |
Singleend |
2SE + 2 |
10 |
Yes |
156 (39x4) |
22 |
2 |
|
|
1P/2P |
256 |
4 |
Singleend |
2SE + 2 |
10 |
Yes |
156 (39x4) |
22 |
2 |
|
|
1P/2P |
128 |
4 |
Differential |
2D + 2 |
10 |
Yes |
268 (67x4) |
43 |
2 |
|
|
1P/2P |
256 |
4 |
Differential |
2D + 2 |
10 |
Yes |
268 (67x4) |
43 |
2 |
|
|
3P |
128 |
4 |
Differential |
4D + 3 |
10 |
Yes |
228 (57x4) |
39 |
2 |
|
|
3P |
128 |
4 |
Differential |
4D + 3 |
10 |
Yes |
228 (57x4) |
39 |
2 |
|
|
3P |
128 |
4 |
Differential |
4D + 3 |
10 |
Yes |
300 (75x4) |
52 |
2 |
|
|
3P |
256 |
4 |
Differential |
4D + 3 |
10 |
Yes |
300 (75x4) |
52 |
2 |
|
|
1P |
32 |
3 |
Differential |
2D + 1 |
5 |
Yes |
222 (37x6) |
30 |
2 |
|
|
1P |
64 |
5 |
Differential |
2D + 1 |
5 |
Yes |
222 (37x6) |
30 |
2 |
|
|
1P |
128 |
5 |
Differential |
2D + 1 |
5 |
Yes |
222 (37x6) |
30 |
2 |
|
|
1P/2P |
64 |
5 |
Differential |
2D + 2 |
5 |
Yes |
336 (56x6) |
51 |
2 |
|
|
1P/2P |
128 |
5 |
Differential |
2D + 2 |
5 |
Yes |
336 (56x6) |
51 |
2 |
|
|
3P |
64 |
5 |
Differential |
4D + 3 |
5 |
Yes |
336 (56x6) |
51 |
2 |
|
|
3P |
128 |
5 |
Differential |
4D + 3 |
5 |
Yes |
336 (56x6) |
51 |
2 |
|
|
3P |
128 |
5 |
Differential |
4D + 3 |
5 |
Yes |
336 (56x6) |
51 |
2 |
|
|
3P |
64 |
5 |
Differential |
4D + 3 |
5 |
Yes |
336 (56x6) |
51 |
2 |
|
|
3P |
64 |
5 |
Differential |
4D + 3 |
5 |
Yes |
29 |
1 |
||
|
3P |
64 |
5 |
Differential |
4D + 3 |
5 |
Yes |
29 |
1 |
||
|
1P |
||||||||||
|
1P ,3P |
0 |
0 |
Differential |
2D |
300(50x6) |
70 |
0 |
|||
|
1P/2P |
64 |
8 |
Differential |
2D + 2 |
10 |
Yes |
156(39x4) 190(38X5) 222(37x6) |
39 |
3 |
|
|
1P/2P |
128 |
8 |
Differential |
2D + 2 |
10 |
Yes |
156(39x4) 190(38X5) 222(37x6) |
39 |
3 |
|
|
1P |
256 |
48 |
Differential |
4D + 3SE |
20 |
Yes |
160(40x4) 228(38x6) 288(36x8) |
88 |
5 |
|
|
1P |
512 |
48 |
Differential |
4D + 3SE |
20 |
Yes |
160(40x4) 228(38x6) 288(36x8) |
88 |
5 |
|
|
3P |
256 |
48 |
Differential |
4D + 3SE |
20 |
Yes |
160(40x4) 228(38x6) 288(36x8) |
88 |
5 |
|
|
3P |
512 |
48 |
Differential |
4D + 3SE |
20 |
Yes |
160(40x4) 228(38x6) 288(36x8) |
88 |
5 |
|
|
1P 1P/2P |
1024 |
128 |
Differential |
2D + 2 |
54 |
Yes |
300(50x6) |
70 |
7 |
|
|
3P |
1024 |
128 |
Differential |
4D + 3SE |
54 |
Yes |
300(50x6) |
70 |
8 |
|
|
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