User Manual

CS5463
DS678F3 29
6.1.10 Power Offset Register ( P
off
)
Address: 14
Default = 0x000000
Power Offset (P
off
) is added to the instantaneous power being accumulated in the P
active
register, and can be
used to offset contributions to the energy result that are caused by undesirable sources of energy that are in-
herent in the system. The value is represented in two's complement notation and in the range of -1.0
 Poff  1.0,
with the binary point to the right of the MSB.
6.1.11 Status Register and Mask Register ( Status , Mask )
Address: 15 (Status Register); 26 (Mask Register)
Default = 0x800001 (Status Register), 0x000000 (Mask Register)
The Status Register indicates status within the chip. In normal operation, writing a '1' to a bit will cause the bit
to reset. Writing a '0' to a bit will not change it’s current state.
The Mask Register is used to co ntrol the activation of the INT
pin. Placing a logic '1' in a Mask bit will allow the
correspond in g bit in th e Sta tu s Register to activate the INT
pin when the status bit is asserted.
DRDY Data Ready. During conversions, this bit will indicate the end of computation cycles. For cali-
brations, this bit indicates the end of a calibration sequence.
CRDY Conversion Ready. Indicates a new conversion is ready. This will occur at the output word rate.
IOR Current Out of Range. Set when the
Instantaneous Curr ent Register overflows.
VOR Voltage Out of Range. Set when the
Instantaneous Voltage Register overflows.
IROR I
RMS
Out of Range. Set when the I
RMS
Register overflows.
VROR V
RMS
Out of Range. Set when the V
RMS
Register overflows.
EOR Energy Out of Range. Set when P
ACTIVE
overflows.
IFAULT Indicate s a cu rrent fau lt has occu rred . See Sectio n 5.6
Sag and Fault Detect Featur e on page
19.
VSAG Indicates a voltage sag has occurred. See Section 5.6
Sag and Fault Detect Feature on page
19.
TUP Temperature Updated. Indicates the
Temperat ur e Re gist er has updated.
TOD Modulator oscillation detected on the temperature channel. Set when the modulator oscillates
due to an input above full scale.
VOD (IOD) Modulator oscillation detected on the voltage (current) channel. Set when the modulator oscil-
MSB LSB
-(2
0
)2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
.....
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
23 22 21 20 19 18 17 16
DRDY CRDY IOR VOR
15 14 13 12 11 10 9 8
IROR VROR EOR IFAULT VSAG
76543210
TUP TOD VOD IOD LSD FUP
IC