psd835g2 STMicroelectronics, psd835g2 Datasheet - Page 99

• Manufacturer Part Number: psd835g2
• Description: Configurable Memory System On A Chip For 8-bit Microcontrollers
• Manufacturer: STMicroelectronics

PSD835G2
Table 29.
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 Flash memory WRITE or Erase cycles in progress.
Calculation is based on I
CC
total
(Freq PLD)
% Flash memory Access = 80%
% SRAM access
% I/O access
% Normal
% Power-down mode
(from fitter report)
% of total product terms
Turbo mode
Example of PSD typical power calculation at V
OUT
= 0 mA.
= 8 MHz
= 4 MHz
= 15%
= 5% (no additional power above base)
= 10%
= 90%
= 45 PT
= 45/193 = 23.3%
= ON
= Ipwrdown x %pwrdown + %normal x (I
= 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
Calculation (using typical values)
Conditions
+ %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)
CC
= 5.0V (with Turbo mode On)
CC
(ac) + I
DC and AC parameters
CC
(dc))
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