Embedded system is a combination of Hardware and Software. Microcontroller like AT89SX, PIC, ARDUINO which places a vital role on this.
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syllabusFull description
An embedded system is nearly any computing system other than a desktop computer. An embedded system is a dedicated system which performs the desired function upon power up, repeatedly.
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Embedded systems notes
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3.2. OPERATING PARAMETERS 97
Output Gate Parameters V DD = 3.3 VDC V OH = 2.4 V
V OL = 0.4 V V SS = 0 VDC
Input Gate Parameters V DD = 3.3 VDC IOH
IOL
IH
V IH = 2.0 V
IL
V IL = 0.8 V V SS = 0 VDC
(a) Voltage and current electrical parameters.
Vcc tpd loc
LVC
LVA
LVT
1.65–3.6 V 5.5 ns 10 uA
2.0–5.5 V 14 ns 20 uA
2.7–3.6V 3.5 ns 190 uA
(b) LV parameters.
Figure 3.2: Low voltage compatible logic families.
Typical values for a microcontroller in the HC CMOS family, assuming V DD D 5:0 volts and V SS D 0 volts, are provided below. e minus sign on several of the currents indicates a current flow out of the device. A positive current indicates current flow into the device. •
