78M6612

19-5348; Rev 2; 1/12 78M6612 Single-Phase, Dual-Outlet Power and Energy Measurement IC DATA SHEET DS_6612_001 DESCRIPTION The Teridian™ 78M6612 is a highly integrated, single-phase, power and energy measurement and monitoring system-onchip (SoC) that includes a 32-bit compute engine (CE), an MPU core, RTC, and flash. Our Single Converter Technology® with a 22-bit delta-sigma ADC, four analog inputs, digital temperature compensation, and precision voltage reference supports a wide range of single-phase, dual-outlet power measurement applications with very few external components. W ith measurement technology leveraged from Maxim’s flagship utility metering ICs, the device offers features including 32 KB of flash program memory, 2 KB shared RAM, three low-power modes with internal timer or external event wake-up, two UARTs, I2C/MICROWIRE® EEPROM I/F, and an in-system programmable flash. Complete outlet measurement unit (OMU) and AC power monitor (AC-PMON) firmware is available or can be preloaded into the IC. A complete array of ICE and development tools, programming libraries and reference designs enable rapid development and certification of power and energy measurement solutions that meet the most demanding worldwide electricity metering standards. LIVE NEUT CT OUTLET POWER SUPPLY FEATURES • Measures Each Outlet of a Duplex Receptacle with a Single IC • Provides Complete Energy Measurement and Communication Protocol Capability in a Single IC • Intelligent Switch Control Capability • < 0.5% Wh Accuracy Over 2000:1 Current Range and Over Temperature • Exceeds IEC 62053/ANSIC12.20 Standards • Voltage Reference < 40 ppm/°C • Four Sensor Inputs – VDD Referenced • Low Jitter Wh and VARh Pulse Test Outputs (10 kHz max) • Pulse Count for Pulse Outputs • 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°) • Battery Backup for RTC and Battery Monitor • Three Battery Modes with Wake-Up Timer: Brownout Mode (48 µA) LCD Mode (5.7 µA) Sleep Mode (2.9 µA) • Energy Display on Main Power Failure • Wake-Up Timer • 22-Bit Delta-Sigma ADC • 8-Bit MPU (80515), 1 Clock Cycle per Instruction with Integrated ICE for MPU Debug • RTC with Temperature Compensation • Auto-Calibration • Hardware watchdog Timer, Power-Fail Monitor • LCD Driver (Up to 152 Pixels) • Up to 18 General-Purpose I/O Pins • 32 kHz Time Base • 32 KB Flash with Security • 2 KB MPU XRAM • Two UARTs • Digital I/O Pins Compatible with 5 V Inputs • 64-Pin LQFP or 68-Pin QFN Package • RoHS-Compliant (6/6) Lead(Pb)-Free Packages • Complete Application Firmware Available CONVERTER IA VA IB VB V3.3A V3.3 SYS GNDA GNDD PWR MODE CONTROL WAKE-UP REGULATOR VBAT V2.5 BATTERY OPTIONAL TERIDIAN 78M6612 VOLTAGE REF VREF VBIAS SERIAL PORTS TX0 RX0 RX1 TX1 COMPARATOR V1 OSC/PLL XIN XOUT TEMP SENSOR RAM FLASH COMPUTE ENGINE DIO, PULSE COM0..3 SEG0..18 SEG 24..31/ DIO 4..11 SEG 34..37/ DIO 14..17 SEG 32,33, 38/ICE 2 OPTIONAL I C or µWire EEPROM POWER FAULT 32 kHz RTC TIMERS ICE ICE_E V3P3D GNDD MPU Teridian is a trademark and S ingle Converter Technology is a registered trademark of Maxim Integrated Products, Inc. MICROWIRE is a registered trademark of National Semiconductor Corp. Rev 2 1 78M6612 Data Sheet DS_6612_001 Table of Contents 1 Hardware Description .................................................................................................................... 7 1.1 Hardware Overview................................................................................................................. 7 1.2 Analog Front End (AFE) .......................................................................................................... 8 1.2.1 Input Multiplexer .......................................................................................................... 8 1.2.2 A/D Converter (ADC) ................................................................................................... 9 1.2.3 FIR Filter ..................................................................................................................... 9 1.2.4 Voltage References ..................................................................................................... 9 1.2.5 Temperature Sensor.................................................................................................... 9 1.2.6 Battery Monitor ............................................................................................................ 9 1.3 Digital Computation Engine (CE) ........................................................................................... 10 1.3.1 Real-Time Monitor ..................................................................................................... 10 1.3.2 Pulse Generator ........................................................................................................ 10 1.3.3 Data RAM (XRAM) .................................................................................................... 10 1.4 80515 MPU Core .................................................................................................................. 11 1.4.1 UARTs ...................................................................................................................... 11 1.5 On-Chip Resources............................................................................................................... 11 1.5.1 Oscillator ................................................................................................................... 11 1.5.2 PLL and Internal Clocks............................................................................................. 11 1.5.3 Real-Time Clock (RTC) ............................................................................................. 12 1.5.4 Temperature Sensor.................................................................................................. 12 1.5.5 Flash Memory ........................................................................................................... 12 1.5.6 Optical Interface ........................................................................................................ 13 1.5.7 Digital I/O .................................................................................................................. 13 1.5.8 LCD Drivers .............................................................................................................. 16 1.5.9 EEPROM Interface .................................................................................................... 16 1.5.10 Hardware Watchdog Timer ........................................................................................ 17 1.5.11 Test Ports (TXUXOUT pin) ........................................................................................ 17 Functional Description ................................................................................................................ 18 2.1 Theory of Operation .............................................................................................................. 18 2.2 Fault and Reset Behavior ...................................................................................................... 19 2.2.1 Reset Mode ............................................................................................................... 19 2.2.2 Power Fault Circuit .................................................................................................... 19 2.3 Data Flow ............................................................................................................................. 19 2.4 CE/MPU Communication ...................................................................................................... 20 Application Information ............................................................................................................... 21 3.1 Connection of Sensors (CT, Resistive Shunt) ........................................................................ 21 3.2 Connecting 5 V Devices ........................................................................................................ 22 3.3 Temperature Measurement ................................................................................................... 22 3.4 Temperature Compensation .................................................................................................. 22 3.5 Connecting LCDs .................................................................................................................. 23 2 3.6 Connecting I C EEPROMs .................................................................................................... 23 3.7 Connecting Three-Wire EEPROMs ....................................................................................... 24 3.8 UART0 (TX0/RX0) ................................................................................................................ 24 3.9 UART1 (TX1/RX1) ................................................................................................................ 25 3.10 Connecting V1 and Reset Pins .............................................................................................. 25 3.11 Connecting the Emulator Port Pins ........................................................................................ 26 3.12 Flash Programming ............................................................................................................... 26 3.13 MPU Firmware Library .......................................................................................................... 26 3.14 Crystal Oscillator ................................................................................................................... 26 3.15 Measurement Calibration ...................................................................................................... 27 Electrical Specifications .............................................................................................................. 28 4.1 Absolute Maximum Ratings ................................................................................................... 28 4.2 Recommended External Components ................................................................................... 29 Rev 2 2 3 4 2 DS_6612_001 4.3 4.4 78M6612 Data Sheet 4.5 Recommended Operating Conditions .................................................................................... 29 Performance Specifications ................................................................................................... 30 4.4.1 Input Logic Levels ..................................................................................................... 30 4.4.2 Output Logic Levels................................................................................................... 30 4.4.3 Power-Fault Comparator ........................................................................................... 30 4.4.4 Battery Monitor .......................................................................................................... 31 4.4.5 Supply Current .......................................................................................................... 31 4.4.6 V3P3D Switch ........................................................................................................... 31 4.4.7 2.5V Voltage Regulator ............................................................................................. 32 4.4.8 Low Power Voltage Regulator ................................................................................... 32 4.4.9 Crystal Oscillator ....................................................................................................... 32 4.4.10 VREF, VBIAS ............................................................................................................ 33 4.4.11 LCD Drivers .............................................................................................................. 33 4.4.12 ADC Converter, V3P3A Referenced .......................................................................... 34 4.4.13 UART1 Interface........................................................................................................ 34 4.4.14 Temperature Sensor.................................................................................................. 34 Timing Specifications ............................................................................................................ 35 4.5.1 RAM and Flash Memory ............................................................................................ 35 4.5.2 Flash Memory Timing ................................................................................................ 35 4.5.3 EEPROM Interface .................................................................................................... 35 4.5.4 RESET and V1 .......................................................................................................... 35 4.5.5 RTC .......................................................................................................................... 35 5 Packaging .................................................................................................................................... 36 5.1 64-Pin LQFP Package .......................................................................................................... 36 5.1.1 Pinout........................................................................................................................ 36 5.1.2 Package Outline (LQFP 64)....................................................................................... 37 5.1.3 Recommended PCB Land Pattern for the LQFP-64 Package..................................... 38 5.2 68-Pin QFN Package ............................................................................................................ 39 5.2.1 Pinout........................................................................................................................ 39 5.2.2 Package Outline ........................................................................................................ 40 5.2.3 Recommended PCB Land Pattern for the QFN-68 Package ...................................... 41 Pin Descriptions .......................................................................................................................... 42 6.1 Power/Ground Pins ............................................................................................................... 42 6.2 Analog Pins........................................................................................................................... 42 6.3 Digital Pins............................................................................................................................ 43 I/O Equivalent Circuits................................................................................................................. 44 Ordering Information ................................................................................................................... 45 Contact Information ..................................................................................................................... 45 6 7 8 9 Revision History .................................................................................................................................. 46 Rev 2 3 78M6612 Data Sheet DS_6612_001 Figures Figure 1: IC Functional Block Diagram ..................................................................................................... 6 Figure 2: AFE Block Diagram ................................................................................................................... 8 Figure 3: Connecting an External Load to DIO Pins ............................................................................... 15 Figure 4: Functions Defined by V1 ......................................................................................................... 17 Figure 5: Voltage, Current, Momentary and Accumulated Energy........................................................... 18 Figure 6: MPU/CE Data Flow ................................................................................................................. 19 Figure 7: MPU/CE Communication ........................................................................................................ 20 Figure 8: Resistive Voltage Divider ........................................................................................................ 21 Figure 9: Resistive Current Shunt .......................................................................................................... 21 Figure 10: Current Transformer.............................................................................................................. 21 Figure 11: Connecting LCDs .................................................................................................................. 23 Figure 12: I2C EEPROM Connection ...................................................................................................... 23 Figure 13: Three-Wire EEPROM Connection ......................................................................................... 24 Figure 14: Connections for the RX0 Pin ................................................................................................. 24 Figure 15: Voltage Divider for V1 ........................................................................................................... 25 Figure 16: External Components for RESET: Development Circuit (Left), Production Circuit (Right) ....... 25 Figure 17: External Components for the Emulator Interface.................................................................... 26 Figure 18: 64-Pin LQFP Pinout .............................................................................................................. 36 Figure 19: 68-Pin QFN Pinout ................................................................................................................ 39 4 Rev 2 DS_6612_001 78M6612 Data Sheet Tables Table 1: Inputs Selected in Regular and Alternate Multiplexer Cycles....................................................... 8 Table 2: Data/Direction Registers and Internal Resources for DIO Pin Groups ....................................... 14 Table 3: DIO_DIR Control Bit ................................................................................................................. 15 Table 4: Selectable Controls using the DIO_DIR Bits ............................................................................. 16 Table 5: Absolute Maximum Ratings ...................................................................................................... 28 Table 6: Recommended External Components ...................................................................................... 29 Table 7: Recommended Operation Conditions ....................................................................................... 29 Table 8: Input Logic Levels .................................................................................................................... 30 Table 9: Output Logic Levels ................................................................................................................. 30 Table 10: Power-Fault Comparator Performance Specifications ............................................................. 30 Table 11: Power-Fault Comparator Performance Specifications (BME=1) .............................................. 31 Table 12: Supply Current Performance Specifications ............................................................................ 31 Table 13: V3P3D Switch Performance Specifications ............................................................................. 31 Table 14: 2.5 V Voltage Regulator Performance Specifications .............................................................. 32 Table 15: Low-Power Voltage Regulator Performance Specifications ..................................................... 32 Table 16: Crystal Oscillator Performance Specifications......................................................................... 32 Table 17: VREF, VBIAS Performance Specifications.............................................................................. 33 Table 18: LCD Drivers Performance Specifications ................................................................................ 33 Table 19: ADC Converter Performance Specifications ........................................................................... 34 Table 20: UART1 Interface Performance Specifications ......................................................................... 34 Table 21: Temperature Sensor Performance Specifications ................................................................... 34 Table 22: RAM and Flash Memory Specifications .................................................................................. 35 Table 23: Flash Memory Timing Specifications ...................................................................................... 35 Table 24: EEPROM Interface Timing ..................................................................................................... 35 Table 25: RESET and V1 Timing ........................................................................................................... 35 Table 26: RTC Range ............................................................................................................................ 35 Table 27: Power/Ground Pins ................................................................................................................ 42 Table 28: Analog Pins............................................................................................................................ 42 Rev 2 5 78M6612 Data Sheet VREF ∆Σ ADC CONVERTER MUX VBAT VBIAS VBIAS V3P3A + TEMP VREF MUX MUX CTRL EQU MUX_ALT CHOP_E MUX_DIV OSC (32KHz) VREF_CAL VREF_DIS CROSS CK32 ADC_E FIR VBAT DS_6612_001 V3P3A GNDA V3P3SYS IA VA IB VB V3P3D V3P3D VREF FIR_LEN VBAT VOLT REG XIN XOUT CKTEST/ SEG19 RTCLK (32KHz) MCK PLL CK32 32KHz DIV ADC LCD_ONLY SLEEP CKFIR 4.9MHz V3P3D 2.5V to logic VLC2 VLC1 LCD_MODE LCD_E LCD DISPLAY DRIVER MEMORY SHARE LCD_NUM LCD_MODE LCD_CLK LCD_E LCD_BLKMAP LCD_SEG LCD_Y DIGITAL I/O DIO_EEX DIO_PV/PW DIO_DIR DIO_R LCD_NUM DIO RTC RTC_DEC_SEC RTC_INC_SEC VLC0 GNDD V2P5 CKOUT_E CKOUT_E 4.9MHz CK_GEN ECK_DIS MPU_DIV MUX_SYNC CKCE