Cs5460a – Cirrus Logic CS5460A User Manual
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CS5460A
40
DS487F5
4.1.5 Power-Down
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. Waking up the CS5460A out of sleep state requires more time than waking the
device out of stand-by state, because of the extra time needed to re-start and re-stabilize the analog clock signal.
[S1 S]0
Power-down state
00 = Reserved
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
4.1.6 Calibration
The device has the capability of performing a system AC offset calibration, DC offset calibration, AC gain calibration,
and DC gain calibration. Calibration can be done on the voltage channel, the current channel, or both channels at
the same time. Offset and gain calibrations should NOT be performed at the same time (must do one after the oth-
er). For a given application, if DC gain calibrations are performed, then AC gain calibration should not be performed
(and vice-versa). The proper input voltages must be supplied to the device before initiating calibration.
[V I]
Designates calibration channel
00 = Not allowed
01 = Calibrate the current channel
10 = Calibrate the voltage channel
11 = Calibrate voltage and current channel simultaneously
R
Specifies AC calibration (R=1) or DC calibration (R=0)
G
Designates gain calibration
0 = Normal operation
1 = Perform gain calibration
O
Designates offset calibration
0 = Normal operation
1 = Perform offset calibration
B7
B6
B5
B4
B3
B2
B1
B0
1
0
0
S1
S0
0
0
0
B7
B6
B5
B4
B3
B2
B1
B0
1
1
0
V
I
R
G
O