Infineon XC800 Series, Руководство пользователя

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AP08056
Power Saving Features
A Timer 2 Example
Application Note 24 V1.0, 2006-12
It can be noticed that by reducing the clock frequency of the CPU and peripheral, the
devices will require less current to run.
8.3 Prescaler Mode Current
The program is now programmed to run in prescaler mode with slow-down mode and
slow-down-idle mode. The timer reload value for every measurement was changed such
that the timer will overflow in every 20 ms.
0.052 1001
B
5.43 5.53 -0.10
0.026 1010
B
5.42 5.52 -0.10
0.013 1011
B
5.41 5.51 -0.10
1) Negative value indicates that slow-down-idle mode current > slow-down mode current.
Table 17 Current consumed by XC888 device when timer 2 is active
f
SYS
= 96.50 MHz Current (mA)
Peripheral
Frequency (MHz) CLKREL Slow-Down
(X)
Slow-Down-
Idle (Y)
Difference
1)
X - Y
24.125 0000
B
24.00 20.41 3.59
12.063 0010
B
15.16 13.51 1.65
6.031 0100
B
10.57 9.95 0.62
3.016 0110
B
8.26 8.16 0.10
2.010 0111
B
7.50 7.57 -0.07
1.508 1000
B
7.11 7.26 -0.15
0.754 1010
B
6.52 6.81 -0.29
0.377 1100
B
6.23 6.59 -0.36
0.188 1110
B
6.09 6.47 -0.38
0.126 1111
B
6.04 6.43 -0.39
1) Negative value indicates that slow-down-idle mode current > slow-down mode current.
Table 16 Current consumed by XC866-4FR device when timer 2 is active
f
SYS
= 79.84 MHz Current (mA)