cs5461 Cirrus Logic, Inc., cs5461 Datasheet - Page 29

• Manufacturer Part Number: cs5461
• Description: Single-phase, Bidirectional Power/energy Ic
• Manufacturer: Cirrus Logic, Inc.

6.1.4 Power-Up/Halt
If the device is powered-down, this command will initiate a power on reset. If the part is already powered-on, all com-
putations will be halted.
6.1.5 Power-Down and Software Reset
The device has two power-down states to conserve power. If the chip is put in stand-by state, all circuitry except the
analog/digital clock generators is turned off. In the sleep state, all circuitry except the digital clock generator and the
instruction decoder is turned off. Bringing the CS5461 out of sleep state requires more time than out of stand-by
state, because of the extra time needed to re-start and re-stabilize the analog clock signal.
6.1.6 Calibration
The device can perform a system AC offset calibration, DC offset calibration, AC gain calibration, and DC gain cal-
ibration. Offset and gain calibrations should NOT be performed at the same time (must do one after the other). Only
one gain calibration sequence should be performed for any given application. If calibration is needed, calibrate either
AC gain or DC gain, but not both. The user must supply the proper inputs to the device before initiating calibration.
DS546F2
B7
B7
B7
1
1
1
V,I
R
G
O*
*If O is set then G is ignored.
S1,S0
B6
B6
B6
0
0
1
B5
B5
B5
1
0
0
00 = Software Reset
01 = Halt and enter stand-by power saving state. This state allows quick power-on time
10 = Halt and enter sleep power saving state. This state requires a slow power-on time
11 = Reserved
00 = Calibrate neither channel
11 = Calibrate voltage and current channel simultaneously
Designates calibration
0 = DC calibration
1 = AC calibration
0 = No gain calibration
1 = Perform gain calibration
0 = No offset calibration
1 = Perform offset calibration
Power-down state
Designates calibration channel
01 = Calibrate the current channel
10 = Calibrate the voltage channel
Designates gain calibration
Designates offset calibration
B4
B4
B4
S1
V
0
B3
B3
B3
S0
0
I
B2
B2
B2
R
0
0
B1
B1
B1
G
0
0
B0
B0
B0
O
0
0
CS5461
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