78M6631-IM/F MAXIM [Maxim Integrated Products], 78M6631-IM/F Datasheet
78M6631-IM/F
Available stocks
Related parts for 78M6631-IM/F
78M6631-IM/F Summary of contents
Page 1
... DS_6631_056 DESCRIPTION The Teridian™ 78M6631 is a highly integrated 3-phase power measurement and monitoring system-on-chip (SoC), with a 10 MHz 8051-compatible MPU core and Single Converter Technology® containing a 22-bit delta- sigma converter and 32-bit compute engine (CE). The 78M6631 has been designed specifically for a wide variety of applications requiring 3-phase power and quality measurements ...
Page 2
Hardware Functional Description ................................................................................................. 5 1.1 Hardware Overview................................................................................................................. 5 1.2 Device Reset .......................................................................................................................... 7 1.3 Power Management ................................................................................................................ 7 1.3.1 Voltage Regulator........................................................................................................ 7 1.3.2 Power Fault Management ............................................................................................ 7 1.4 Analog Front-End (AFE) .......................................................................................................... 8 1.4.1 Analog Current and ...
Page 3
Power and Ground Pins ........................................................................................................ 26 4.2 Analog Pins........................................................................................................................... 26 4.3 Digital Pins ............................................................................................................................ 27 5 I/O Equivalent Circuits ................................................................................................................. 28 6 Ordering Information ................................................................................................................... 29 7 Contact Information ..................................................................................................................... 29 Revision History .................................................................................................................................. 30 Rev 1 3 ...
Page 4
... Figures Figure 1: 78M6631 IC Functional Block Diagram ..................................................................................... 6 Figure 2: AFE Block Diagram ................................................................................................................... 8 Figure 3: Functions Defined by V1 ......................................................................................................... 11 Figure 4: SPI Slave Port: Typical Read and Write Operations ................................................................ 13 Figure 5: SPI Slave Port Timing ............................................................................................................. 22 Figure 6: Pinout for QFN-56 Package .................................................................................................... 23 Figure 7: PCB Land Pattern for QFN-56 Package .................................................................................. 25 Figure 8: I/O Equivalent Circuits............................................................................................................. 28 Tables Table 1: SPI Command Description ...
Page 5
... Various current sensor technologies are supported including Current Transformers (CT), Resistive Shunts, and Rogowski coils. The 32-bit compute engine (CE) of the 78M6631 sequentially process the samples from the analog inputs on pins IA, IB, IC, VA, VB, and VC and performs calculations to measure active power (Watts), reactive power (VARs), apparent power (VAs), power factor, fundamental power, and harmonic power for three independent phases ...
Page 6
... VB VC V3P3D TEMP 80MHz XIN OSC (32. 768kHz) XOUT RTC TEST CKTEST MODE RX UART TX FAULTZ V1 POWER FAULT Figure 1: 78M6631 IC Functional Block Diagram 6 VREF V3P3A ∆Σ ADC CONVERTER VBIAS FIR CE VREF CE_ PROG 16 CE_ DATA MCK FLASH CK_CE PLL 128KB CK_ MPU ...
Page 7
... Power Management 1.3.1 Voltage Regulator The 78M6631 provides an on-chip voltage regulator to create a 2.5 V supply for the digital logic. This regulator can be run off of the V3P3SYS or VBAT inputs depending upon power availability. 1.3.2 Power Fault Management The 78M6631 provides for both hardware and software controlled power fault management. The V1 pin is connected to a comparator to monitor system power fault conditions. When the input to the comparator falls (V1 < ...
Page 8
... CTRL 1.4.1 Analog Current and Voltage Inputs With all CE code implementations for the 78M6631, pins IAP, IAN, IBP, IBN, ICP, ICN, VA, VB, and VC are analog inputs to the AFE for measuring current and voltage. Various current sensor technologies can be supported including Current Transformers, Resistive Shunts, and Rogowski coils. ...
Page 9
Digital Computation Engine (CE) The CE, a dedicated 32-bit digital signal processor, performs the back-end computations. CE calculations include: • Gain and offset compensation • Delay compensation on all channels • 90° phase shift for VAR calculations • Frequency ...
Page 10
... Flash The 78M6631 includes 128 KB of on-chip flash memory. For read/write access from the CPU, the flash is broken into four 32 KB banks that are managed by SFR settings. For erasing of the flash memory from the CPU, the flash is segmented into individual 1024-byte pages and also controlled by SFR settings. ...
Page 11
... Oscillator The 78M6631 oscillator drives a standard 32.768 kHz quartz crystal. These crystals are accurate and do not require a high-current oscillator circuit. The 78M6631 oscillator has been designed specifically to handle these crystals and is compatible with their high impedance and limited power handling capability. ...
Page 12
... General-Purpose Digital I/O The 78M6631 includes 17 general-purpose digital I/O pins. As inputs, these pins are 5V compatible (no current-limiting resistors are needed). On reset or power-up, all DIO pins are inputs. Their input/output directions are subsequently set by the MPU. The digital I/O pins can be categorized as follows: • ...
Page 13
... Programmer’s Reference Manual for more information regarding the use of TMUXOUT. 1.20 UART The 78M6631 includes one UART (UART0) that can be programmed to communicate with a variety of external devices. The UART is a dedicated 2-wire serial interfaces (no hardware flow control/handshaking), which can communicate at rates up to 38,400 bps. All UART transfers are programmable for parity enable, parity, 2 stop bits/1 stop bit and XON/XOFF options for variable communication baud rates from 300 to 38,400 bps. Refer to the 78M6631 Programmer’ ...
Page 14
... In-Circuit Emulator (ICE) Port The 78M6631 implements an In-Circuit Emulator (ICE) port for debug and programming of the device. To enable the use of the port the ICE_E pin must be pulled high. In this mode the E_RST, E_TCLK, and E_RXTX pins are enabled. Contact Maxim support for more information regarding the use of the ICE interface for device programming and debug ...
Page 15
Electrical Specifications 2.1 Absolute Maximum Ratings Table 2 shows the absolute maximum ranges for the device. Stresses beyond Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation at these or ...
Page 16
Recommended External Components Table 3: Recommended External Components Name From To C1 V3P3A AGND C3 V3P3D DGND XTAL XIN XOUT CXS XIN AGND CXL XOUT AGND Notes: 1. AGND and DGND should be connected together. 2. V3P3Ds and V3P3A ...
Page 17
Performance Specifications 2.4.1 Input Logic Levels Parameter 1 Digital high-level input voltage 1 Digital low-level input voltage , V Input pullup current E_RXTX, E_RST, CKTEST Other digital inputs Input pulldown current ICE_E RESET Other digital ...
Page 18
Power Supply Monitor Table 8: Power Supply Monitor Performance Specifications (BME= 1) Parameter Load Resistor [M40MHZ, M26MHZ] = [00], [10], or [11] LSB Value [M40MHZ, M26MHZ] = [01] Offset Error 2.4.5 Supply Current Table 9: Supply Current Performance Specifications ...
Page 19
Temperature Sensor Table 11 shows the performance for the temperature sensor. The LSB values do not include the 8-bit left shift at CE input. Table 11: Temperature Sensor Performance Specifications Parameter Nominal relationship: N( [M26MHZ, M40MH] ...
Page 20
ADC Converter, V3P3A Referenced Table 13 shows the performance specifications for the ADC converter, V3P3A referenced. For this data, FIR_LEN = 0, VREF_DIS = 0 and LSB values do not include the 9-bit left shift at the CE input. ...
Page 21
Timing Specifications 2.5.1 Flash Memory Table 14: Flash Memory Timing Specifications Parameter Flash write cycles Flash data retention Flash data retention Flash byte write operations between page or mass erase operations Write Time per Byte Page Erase (1024 bytes) ...
Page 22
SPI Slave Port Parameter t PCLK cycle time SPIcyc t Enable lead time SPILead t Enable lag time SPILag High t PCLK pulse width SPIW Low t PCSZ to first PCLK fall SPISCK t Disable time SPIDIS t PCLK ...
Page 23
Packaging 3.1 56-Pin QFN Package 3.2 Pinout E_RST 1 E_TCLK 2 GNDD 3 E_RXTX 4 TMUXOUT PCLK 7 V3P3D 8 CKTEST 9 V3P3SYS 10 PSDO 11 PCSZ 12 DIO17 13 DIO3 14 Rev 1 Teridian 78M ...
Page 24
QFN Package Outline 24 Rev 1 ...
Page 25
Recommended PCB Land Pattern for the QFN-56 Package Figure 7: PCB Land Pattern for QFN-56 Package Rev 1 25 ...
Page 26
Pin Descriptions 4.1 Power and Ground Pins Name Type Circuit GNDA P – Analog ground: This pin should be connected directly to the ground plane. GNDD P – Digital ground: This pin should be connected directly to the ground ...
Page 27
Digital Pins Name Type Circuit DIO3 I Multi-use pins, DIO. DIO4,DIO5,DIO6 I/O DIO8, DIO9, DIO11 DIO17 DIO24, DIO25 DIO29, DIO30 DIO45, DIO47 DIO51, DIO53 DIO55 D SPI PORT. PCLK I/O PSDO PCSZ ...
Page 28
I/O Equivalent Circuits V3P3D V3P3D 110K Digital CMOS Input Input Pin GNDD Digital Input Equivalent Circuit Type 1: Standard Digital Input or pin configured as DIO Input with Internal Pull-Up V3P3D Digital CMOS Input Input Pin 110K GNDD GNDD ...
Page 29
... Contact Information For more information about Maxim products or to check the availability of the 78M6631, contact technical support at www.maxim-ic.com/support. Rev 1 Table 21: Ordering Information Flash Packaging Size Bulk 78M6631-IM/F 128 KB Tape and Reel 78M6631-IMR/F 78M6631 Data Sheet Package Order Number Marking 78M6631-IM ...
Page 30
... 2012 Maxim Integrated Products 78M6631 Data Sheet DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products ...