PSD511B1-C-90UI View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

PSD511B1-C-90UI

Low Cost Field Programmable Microcontroller Peripherals

STMicroelectronics 

Specifications

(cont.)

PSD5XX Family

Figure 51. ZPLD Typical ICC / Frequency Consumption (ZPSD5XXV Devices) (3 V)

PT100%

PT25%

50

40

TURBO ON

30

TURBO ON

20

10

OFF

TURBO TURBO

OFF

0

0

5

10

15

20

25

COMPOSITE FREQUENCY AT PLD INPUTS (MHz)

13.5 Example of PSD5XX Typical Power Calculation at VCC = 5.0 V

Conditions

Composite PLD input frequency (Freq PLD)

MCU ALE frequency (Freq ALE)

% EPROM Access

% SRAM access

% I/O access

Operational Modes

% Normal

% Sleep

Number of product terms used

(from fitter report)

% of total product terms

Turbo = off

CMiser = on

8-bit bus mode

= 8 MHz

= 4 MHz

= 80%

= 15%

= 5% (no additional power above base)

= 10%

= 90%

= 45 PT

= 29/118 = 24.6%

Calculation (typical numbers used)

ICC total = Isleep x %sleep + %normal x (ICC (ac) + ICC (dc))

= Isleep x %sleep + % normal x (%EPROM x 0.8 mA/MHz x Freq ALE

+ %SRAM x 1.4 mA/MHz x Freq ALE

+ %PLD x (from graph using Freq PLD))

= 10 µA x 0.90 + 0.1 x (0.8 x 0.8 mA/MHz x 4 MHz

+ 0.15 x 1.4 mA/MHz x 4 MHz + 0.95 x 23

= 0.9 µA + 0.1 x (2.56 + 0.84 + 21.85)

= 0.9 µA + 0.1 x 25.3

= 0.9 µA + 2.53 mA

= 2.53 mA

Standby current consumption is handled similarly to sleep mode shown above.

Calculation based on IOUT = 0 mA.

111

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