Rainbow-electronics MAXQ7667 Manual do Utilizador descarregar pdf (Página 14)

MAXQ7667

16-Bit, RISC, Microcontroller-Based,

Ultrasonic Distance-Measuring System

14 ______________________________________________________________________________________

BURST ENABLE

BURST

TRANSDUCER

ECHON

ECHOP

GATE5

DVDDIO

BSP129

BURST OUTPUT

DUTY CYCLE

AND PULSE

COUNTER

2mV

P-P

SIGMA-

DELTA

ADC

12-BIT

SAR ADC

0.47µF

VOLTAGE

REFERENCE

THRESHOLD

ADJUST

MAXQ20 RISC

µC

PROGRAMMABLE

PLL

CLOCK PRESCALER

DIVIDE BY 1 TO 128

DIGITAL

BANDPASS

FILTER

LNA

SCHEDULE

TIMER

CRYSTAL

OSCILLATOR

13.5MHz

OSCILLATOR

WATCHDOG

POR/

BROWNOUT

INTERFACE

MODULE

LIN

TRANSCEIVER

CONNECTOR

TIMER 2

PO.6/T2

PO.7/T2B

PO.3/T0/ADCCTL

PO.4/T0B

PO.5/T1

RESET

AGND

TIMER 1 TIMER 0

FULL-

WAVE

RECTIFIER

DIGITAL

LOWPASS

FILTER

INTERRUPT

FIFO

ROM

FLASH

RAM

16 x 16

HW MULT

PLUS ACCUM

AIN0

REFREFBG

AIN1

AIN2

AIN3

THERMISTOR

BATTERY+

AIN4

FILT

24kΩ

33nF

330pF

AVDD

20pF

XIN XOUT

16MHz

0.1µF

0.01µF

470pF

20pF

REG3P3

AVDD

0.1µF

REG2P5

DVDD

DGND

GPIO/JTAG

GPIO/SPI

P0.0/URX

LIN

+8V TO

+20V

LIN

GND

V+

P0.1/UTX

0.1µF

MAXQ7667

Typical Application Circuit/Functional Diagram

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 39 40

MAXQ7667 1

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