User guide

Arch Meter Corporation PS1000 Ver1.2
PS1000Rev. 1.2 May 2006
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www.archmeter.com
14. Power Management
In PS1000, it design a lot of power management control method. Most of the
functional block can turn-on/off individually. The MCU/DSP/ADC also can
operate on a lot of different clock rate. It is programmable by setting the clock diver
counter. It can make the power management more easily.
The following blocks have its own enable configuration setting.
Functional Block Enable Setting Operation
Current(3.3V)
Operation Current
(2.5V)
Fully Operation 26.17mA 32.95mA
DSP DSPCFG[7]=0 1.32mA
LCD LCDCFG[7]=0 0.2mA
RTC RTCCFG[7]=0 7uA
AGC AGCCFG[7]=0 0.1mA
ADC ADCCFG[7]=0 7.77mA
Temperature Sensor SARCFG[7]=0 0.6mA
MCU Power Down 2.33mA 3.73mA
For the MCU and DSP, when you change the different operation frequency, it also
can help to save the power consumption or increase the MCU/DSP performance. Here
is the reference table for MCU/DSP power consumption for different operation
condition.
MCUDIV[3:0]
DSPDIV[3:0]
Crystal
(24MHz)
MCU Power
Consumption(2.5V)
DSP Power
Consumption(2.5V)
0000 SCLK / 1 24.00
26.24mA 4.92mA
0001 SCLK / 2 12.00
11.57mA 2.34mA
0010 SCLK / 3 8.00
7.66mA 1.57mA
0011 SCLK / 4 6.00
5.62mA 1.19mA
0100 SCLK / 5 4.80
4.5mA 0.95mA
0101 SCLK / 6 4.00
3.81mA 0.8mA
0110 SCLK / 7 3.43 N/A N/A
0111 SCLK / 8 3.00
2.8mA 0.6mA
1000 SCLK / 9 2.67 N/A N/A
1001 SCLK / 10 2.40 N/A N/A
1010 SCLK / 11 2.18 N/A N/A
1011 SCLK / 12 2.00
1.81mA 0.39mA
1100 SCLK / 13 1.85 N/A N/A
1101 SCLK / 14 1.71 N/A N/A
1110 SCLK / 15 1.60 N/A N/A
1111 SCLK / 16 1.50
1.42mA 0.29mA