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Hardware-Aufbau der Steuerung

Hardware-Aufbau der Steuerung. PG Airbag Lei Yao. Überblick. Beschleunigungssensor. Temic BAX 50 Piezoelektrisch Ub : Versorgungsspannung 5 V Ua : Ausgangsruhespannung Ub/2 V aB : Beschleunigungsbereich + 47 g E : Empfindlichkeit 33—48—57 mV/g. Board.

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Hardware-Aufbau der Steuerung

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  1. Hardware-Aufbau der Steuerung PG Airbag Lei Yao

  2. Überblick

  3. Beschleunigungssensor • Temic BAX 50 Piezoelektrisch • Ub : Versorgungsspannung 5 V • Ua : Ausgangsruhespannung Ub/2 V • aB : Beschleunigungsbereich + 47 g • E : Empfindlichkeit 33—48—57 mV/g

  4. Board ATMEL AT91EB01 Evaluation Board Microcontroller: AT91M40400 • Prozessor: ARM7TDMI

  5. Board • 4 K Bytes Internal RAM • 512 K ---2048 K Bytes 16-Bit SRAM • 128 K Bytes Flash • 2 Serial Ports DB9 Plug/Socket • 20-pin JTAG ICE Interface Connector • Reset Button • 3 Applicative Buttons ( FIQ, TIOB0, IRQ0 ) • 3 LEDs ( TIOA0, TIOA1, TIOB0 ) • Versorgungsspannung 2.7V --- 3.3V • External Bus Interface ( EBI ) • Maximum External Address Space 64M Bytes • Bis zu 8 Chip Selects • 8/16-Bit External Databus

  6. Board

  7. A/D Wandler • National Semiconductor ADC1173CIJM • Resolution 8bits • Maximum Sampling Frequency 15 MSPS • DVDD : Digitale Versorgungsspannung 3V • DVss : Ground für digitale Versorgungsspannung • AVDD : Analoge Versorgungsspannung 3V • AVss : Ground für analoge Versorgungsspannung • VIN : Analoger Signaleingang VRB - VRT • VRT : Reference Top Bias 1.0 V - AVDD • VRB : Reference Bottom Bias 0 V - 2.0 V • OE : Output Enable • D0 -- D7 : Digitale Ausgänge

  8. Aufbau der Hardware NCS2 NRD OE NCS2 CLK CLK-AD 0 0 0 0 0 1 0 1 1 0 1 1 1 0 1 0 1 1 1 1 1 1 1 0 A.Input = 0V VIN = 0V D.Output = 00000000 A.Input = 5V VIN = 3V D.Output = 11111111

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