STPMC1 ST Microelectronics, STPMC1 Datasheet - Page 15

• Manufacturer Part Number: STPMC1
• Description: Programmable poly-phase energy calculator IC
• Manufacturer: ST Microelectronics

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STPMC1
7
7.1
7.2
Terminology
Measurement error
The error associated with the energy measured by the STPMC1 is defined as:
Conventions
The lowest analog and digital power supply voltage is called V
system ground (GND). All voltage specifications for digital input/output pins are referred to
GND.
Positive currents flow into a pin. “Sinking current” is the current flowing into the pin, and so it
is positive. “Sourcing current” is the current flowing out of the pin, and so it is negative.
Signal timing specifications treated by a digital control part are relative to XTAL1. This signal
is provided from the crystal oscillator or from an external source as specified in paragraph
9.4.
Signal timing specifications of the SPI interface are relative to the SCLNLC. There is no
direct relationship between the clock (SCLNLC) of the SPI interface and the clock of the
DSP block (XTAL1).
A positive logic convention is used in all equations.
Percentage
Doc ID 15728 Rev 1
Error
SPMC
( 1
reading
True
)
Energy
True
Energy
SS
which represents the
Terminology
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