S1K50000 Epson Electronics America, Inc., S1K50000 Datasheet - Page 124

• Manufacturer Part Number: S1K50000
• Description: Design Guide S1k50000 Series
• Manufacturer: Epson Electronics America, Inc.

9.5 Notes on Calculating Power Consumption in a Dual-Power-
STANDARD CELL S1K50000 SERIES
DESIGN GUIDE
To calculate the chip’s power consumption in a dual-power-supply system, the power
consumption must be determined separately for the HV
1) Power consumption of input buffers (Pi (HV
Supply System
The calculation formula is the same as for a single-power-supply system. Assuming that
the power consumption of the HV
LV
The sum of Pi (HV
power consumption of the input buffers. For the HV
that applies to 5.0 V (or 3.3 V) and, for the LV
(or 2.0 V) in order to calculate the power consumption in each system. The Kp
the respective power-supply voltages are listed in Table 9-11 below.
P
P
DD
i
i
(HV
(LV
system is represented by Pi (LV
DD
DD
) =
) =
i=1
i=1
K
K
(K
(K
HV
HV
LV
DD
p
p
DD
DD
DD
) and Pi (LV
i
i
= 2.0 V
= 5.0 V
(or LV
f
f
i
i
) (W)
) (W)
V
DD
DD
) = 3.3 V
(Typ.)
DD
DD
) calculated from the above equations represents the
system is represented by Pi (HV
DD
Table 9-11
EPSON
Chapter 9: Precautions on the Use of Dual Power Supplies
):
DD
DD
) and Pi (LV
system, use the Kp
DD
17.7 µW/MHz
DD
6.2 µW/MHz
2.0 µW/MHz
-system input buffers, use the Kp
- and LV
Kp
DD
i
))
DD
-system cells.
i
DD
that applies to 3.3 V
), and that of the
i
values for
119
i