EM773FHN33 NXP Semiconductors, EM773FHN33 Datasheet - Page 13

• Manufacturer Part Number: EM773FHN33
• Description: The EM773 is an ARM Cortex-M0 based, low-cost 32-bit energy metering IC, designed for 8/16-bit smart metering applications
• Manufacturer: NXP Semiconductors

NXP Semiconductors
EM773
Product data sheet
7.10.1 Features
7.12.1 Features
7.11.1 Features
7.12 General purpose external event counter/timers
7.11 Metrology engine
receivers can operate in either master or slave mode, depending on whether the chip has
to initiate a data transfer or is only addressed. The I
controlled by more than one bus master connected to it.
The EM773 contains a metrology engine designed to collect voltage and current inputs to
calculate the active power, reactive power, apparent power and power factor of a load.
The purpose of the metrology engine is for non-billing applications such as plug meters,
smart appliances, industrial and consumer sub-meters, etc.
The EM773 includes two 32-bit counter/timers and one 16-bit counter/timer. The
counter/timer is designed to count cycles of the system derived clock. It can optionally
generate interrupts or perform other actions at specified timer values, based on four
match registers. Each counter/timer also includes one capture input to trap the timer value
when an input signal transitions, optionally generating an interrupt.
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The I
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Easy to configure as master, slave, or master/slave.
Programmable clocks allow versatile rate control.
Bidirectional data transfer between masters and slaves.
Multi-master bus (no central master).
Arbitration between simultaneously transmitting masters without corruption of serial
data on the bus.
Serial clock synchronization allows devices with different bit rates to communicate via
one serial bus.
Serial clock synchronization can be used as a handshake mechanism to suspend and
resume serial transfer.
The I
The I
1 % accurate for scalable input sources up to 230 V/50 Hz/16 A and
110 V/60 Hz/20 A while maintaining this accuracy with a factor of 1 to 400 down from
this maximum current.
Automatically calculates active power in W, reactive power in VAr, apparent power in
VA, power factor ratio, Vrms and Irms without ARM CPU intervention.
Standard API for initializing, starting, stopping and reading data from the metrology
engine using the ARM Cortex M0.
A 32-bit/16-bit timer/counter with a programmable 32-bit/16-bit prescaler.
2
C-bus interface also supports Fast-mode Plus with bit rates up to 1 Mbit/s.
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C-interface is a standard I
C-bus can be used for test and diagnostic purposes.
C-bus controller supports multiple address recognition and a bus monitor mode.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 3 January 2012
2
C-bus compliant interface with open-drain pins. The
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C is a multi-master bus and can be
Energy metering IC
© NXP B.V. 2012. All rights reserved.
EM773
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