CDB5467U Cirrus Logic Inc, CDB5467U Datasheet - Page 23
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CDB5467U
Manufacturer Part Number
CDB5467U
Description
BOARD EVAL FOR CS5467 ADC
Manufacturer
Cirrus Logic Inc
Type
A/Dr
Specifications of CDB5467U
Main Purpose
Power Management, Energy/Power Meter
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
CS5467
Primary Attributes
Watt-Hour Meter
Secondary Attributes
Graphical User Interface, SPI™ & USB Interfaces
Product
Data Conversion Development Tools
Maximum Clock Frequency
4 MHz
Interface Type
USB
Supply Voltage (max)
5 V
Supply Voltage (min)
3.3 V
For Use With/related Products
CS5467
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
Other names
598-1555
CDB-5467U
CDB-5467U
7. USING THE CS5467
7.1 Initialization
The CS5467 uses a power-on-reset circuit (POR) to
provide an internal reset until the analog voltage reach-
es 4.0 V. The RESET input pin can also be used by the
application circuit to reset the part.
After RESET is removed and the oscillator is stable, an
initialization program is executed to set the default reg-
ister values.
A Software Reset command is also provided to allow
the application to run the initialization program without
removing power or asserting RESET.
The application should avoid sending commands during
initialization. The DRDY bit in the Status register indi-
cates when the initialization program has completed.
7.2 Power-down States
The CS5467 has two power-down states, stand-by and
sleep. In the stand-by state, all circuitry except the volt-
age reference and crystal oscillator is powered off. In
sleep state, all circuitry except the instruction decoder is
powered off.
To return the device to the active state, send a Wake-
up/Halt command to the device. When returning from
stand-by mode, registers will retain their contents prior
DS714F1
to entering the stand-by state. When returning from
sleep mode, a complete initialization occurs.
7.3 Voltage Tamper Correction
The CSS5467 provides compensation for meter tam-
pering on voltage channels.
If the application detects that the voltage input has been
impaired it may choose to use the fixed internal RMS
voltage reference by setting the VFIX bit in the Modes
register. The value of this reference ( VF
fault 0.707107 (full-scale RMS) but can be changed by
the application program. (See figure 9)
Figure 9. Fixed RMS Voltage Selection
RMS
CS5467
) is by de-
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