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PSD813F2 数据表(PDF) 76 Page - STMicroelectronics

部件名 PSD813F2
功能描述  Configurable Memory System on a Chip for 8-Bit Microcontrollers
PDF  110 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

PSD813F2 数据表(HTML) 76 Page - STMicroelectronics

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PSD835G2
PSD8XX Family
75
Figure 30a. PLD ICC /Frequency Consumption (PSD835G2V Versions, VCC = 3 V)
0
10
20
30
40
50
60
VCC = 3V
010
15
5
20
25
TURBO
ON (100%)
TURBO
ON (25%)
TURBO
OFF
HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)
PT 100%
PT 25%
Conditions
Highest Composite PLD input frequency
(Freq PLD)
=
8 MHz
MCU ALE frequency (Freq ALE)
=
4 MHz
% Flash Access
=
80%
% SRAM access
=
15%
% I/O access
=
5% (no additional power above base)
Operational Modes
% Normal
=
10%
% Power Down Mode
=
90%
Number of product terms used
(from fitter report)
=
45 PT
% of total product terms
=
45/193 = 23.3%
Turbo Mode
=
ON
Calculation (typical numbers used)
ICC total = Ipwrdown x %pwrdown + %normal x (ICC (ac) + ICC (dc))
= Ipwrdown x %pwrdown + % normal x (%flash x 2.5 mA/MHz x Freq ALE
+ %SRAM x 1.5 mA/MHz x Freq ALE
+ % PLD x 2 mA/MHz x Freq PLD
+ #PT x 400 µA/PT
= 50 µA x 0.90 + 0.1 x (0.8 x 2.5 mA/MHz x 4 MHz
+ 0.15 x 1.5 mA/MHz x 4 MHz
+2 mA/MHz x 8 MHz
+ 45 x 0.4 mA/PT)
= 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
This is the operating power with no Flash writes or erases. Calculation is based
on IOUT = 0 mA.
Example of PSD835G2 Typical Power Calculation at VCC = 5.0 V
AC/DC
Parameters
(cont.)



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