psd813f1a STMicroelectronics, psd813f1a Datasheet - Page 74
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psd813f1a
Manufacturer Part Number
psd813f1a
Description
Flash In-system Programmable Isp Peripherals For 8-bit Mcus, 5 V
Manufacturer
STMicroelectronics
Datasheet
1.PSD813F1A.pdf
(111 pages)
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PSD813F1A
Table 36. Example of PSD Typical Power Calculation at V
74/111
Highest Composite PLD input frequency
MCU ALE frequency (Freq ALE)
Operational Modes
Number of product terms used
I
This is the operating power with no EEPROM WRITE or Flash memory Erase cycles. Calculation is based on I
0mA.
CC
total
(Freq PLD)
% Flash memory Access
% SRAM access
% I/O access
% Normal
% Power-down Mode
(from fitter report)
% of total product terms
Turbo Mode
Calculation (using typical values)
= 8MHz
= 4MHz
= 80%
= 15%
= 5% (no additional power above base)
= 10%
= 90%
= 45 PT
= 45/182 = 24.7%
= ON
= Ipwrdown x %pwrdown + %normal x (I
= Ipwrdown x %pwrdown + % normal x (%flash x 2.5mA/MHz x Freq ALE
= 50µA x 0.90 + 0.1 x (0.8 x 2.5mA/MHz x 4MHz
= 45µA + 0.1 x (8 + 0.9 + 16 + 18mA)
= 45µA + 0.1 x 42.9
= 45µA + 4.29mA
= 4.34mA
Conditions
+ %SRAM x 1.5mA/MHz x Freq ALE
+ % PLD x 2mA/MHz x Freq PLD
+ #PT x 400µA/PT)
+ 0.15 x 1.5mA/MHz x 4MHz
+ 2mA/MHz x 8MHz
+ 45 x 0.4mA/PT)
CC
= 5.0V (Turbo Mode On)
CC
(ac) + I
CC
(dc))
OUT
=