PSD913F1-B-90JI ST Microelectronics, PSD913F1-B-90JI Datasheet - Page 68

• Manufacturer Part Number: PSD913F1-B-90JI
• Description: Flash In-System Programmable ISP Peripherals For 8-bit MCUs
• Manufacturer: ST Microelectronics

AC/DC
Parameters
(cont.)
PSD9XX Family
64
Figure 26a. PLD I
Example of PSD9XX Typical Power Calculation at V
Conditions
Highest Composite PLD input frequency
MCU ALE frequency (Freq ALE)
Operational Modes
Number of product terms used
Turbo Mode
Calculation (typical numbers used)
I
This is the operating power with no Flash writes or erases. Calculation is based
on I
CC
total = Ipwrdown x %pwrdown + %normal x
OUT
(Freq PLD)
% Flash Access
% SRAM access
% I/O access
% Normal
% Power Down Mode
(from fitter report)
% of total product terms
= 0 mA.
60
50
40
30
20
10
= Ipwrdown x %pwrdown + % normal x (%flash x 2.5 mA/MHz x Freq ALE
= 50 µA x 0.90 + 0.1 x (0.8 x 2.5 mA/MHz x 4 MHz
= 45 µA + 0.1 x (8 + 0.9 + 16 + 18 mA)
= 45 µA + 0.1 x 42.9
= 45 µA + 4.29 mA
= 4.34 mA
0
0
V
HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)
CC
CC
/Frequency Consumption
= 3V
+ %SRAM x 1.5 mA/MHz x Freq ALE
+ % PLD x 2 mA/MHz x Freq PLD
+ #PT x 400 µA/PT
+ 0.15 x 1.5 mA/MHz x 4 MHz
+2 mA/MHz x 8 MHz
+ 45 x 0.4 mA/PT)
5
10
= 8 MHz
= 4 MHz
= 80%
= 15%
= 5% (no additional power above base)
= 10%
= 90%
= 45 PT
= 45/153 = 29.4%
= ON
(PSD9XXFV Versions, V
(
I
CC
15
(ac) + I
CC
= 5.0 V
CC
(dc)
20
PT 100%
PT 25%
Preliminary Information
)
CC
= 3 V)
25