Detailed Specifications
2- 4
R ev isio n 1 8
Ptotal = Pdc + Pac
PHCLK = (P1 + P2 * s + P3 * sqrt[s]) * Fs
PCLK = (P4 + P5 * s + P6 * sqrt[s]) * Fs
PR-cells = P7 * ms * Fs
PC-cells = P8 * mc * Fs
Pinputs = P9 * pi * Fpi
Table 2-5 Different Components Contributing to the Total Power Consumption in Axcelerator Devices
Component
Definition
Device Specific Value (in W/MHz)
AX125 AX250 AX500 AX1000 AX2000
P1
Core tile HCLK power component
33
49
71
130
216
P2
R-cell power component
0.2
P3
HCLK signal power dissipation
4.5
9
13.5
18
P4
Core tile RCLK power component
33
49
71
130
216
P5
R-cell power component
0.3
P6
RCLK signal power dissipation
6.5
13
19.5
26
P7
Power dissipation due to the switching activity on the R-cell
1.6
P8
Power dissipation due to the switching activity on the C-cell
1.4
P9
Power component associated with the input voltage
10
P10
Power component associated with the output voltage
See table Per pin contribution
P11
Power component associated with the read operation in the
RAM block
25
P12
Power component associated with the write operation in
the RAM block
30
P13
Core PLL power component
1.5
Pdc = ICCA * VCCA
Pac =PHCLK + PCLK + PR-cells + PC-cells + Pinputs + Poutputs + Pmemory + PPLL
s
= the number of R-cells clocked by this clock
Fs
= the clock frequency
s
= the number of R-cells clocked by this clock
Fs
= the clock frequency
ms = the number of R-cells switching at each Fs cycle
Fs
= the clock frequency
mc = the number of C-cells switching at each Fs cycle
Fs
= the clock frequency
pi
= the number of inputs
Fpi = the average input frequency