Infineon XC800 Series, Руководство пользователя

Страница: 10 / 28

AP08056
Power Saving Features
Reducing Clock Speed (Slow-Down Mode)
Application Note 10 V1.0, 2006-12
Figure 2 Graphical representation of the X and Y series in Table 4
Table 4 Current comparison between slow-down mode and slow-down-idle
mode of a XC866-4FR device
f
SYS
= 79.84 MHz Current (mA)
Peripheral
1)
Frequency (MHz)
1) Peripheral frequency = f
SYS
/CLKREL/Fixed divider of 3 (refer to user’s manual on Clock System)
CLKREL Slow-Down
(X)
Slow-Down-
Idle (Y)
Difference
2)
X - Y
2) Negative value indicates that slow-down-idle mode current > slow-down mode current.
26.613 0000
B
17.84 14.16 3.68
6.653 0010
B
8.62 7.70 0.92
1.663 0100
B
6.19 6.02 0.17
0.832 0101
B
5.78 5.75 0.03
0.416 0110
B
5.58 5.60 -0.02
0.208 0111
B
5.48 5.53 -0.05
0.104 1000
B
5.43 5.50 -0.07
0.052 1001
B
5.40 5.48 -0.08
0.026 1010
B
5.39 5.47 -0.08
0.013 1011
B
5.38 5.47 -0.09
0
2
4
6
8
10
12
14
16
18
20
26.613 6.653 1.663 0.832 0.416 0.208 0.104 0.052 0.026 0.013
Pe r ip h e r al Clo ck Fr e q u e n cy (M Hz ) - XC 866
Cu
rr
en
t (
m
A)
X Y