maxq7667 Maxim Integrated Products, Inc., maxq7667 Datasheet - Page 14

• Manufacturer Part Number: maxq7667
• Description: 16-bit, Risc, Microcontroller-based, Ultrasonic Distance-measuring System
• Manufacturer: Maxim Integrated Products, Inc.

16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
14
GND
TRANSDUCER
LIN
V+
______________________________________________________________________________________
+8V TO
+20V
LIN
TRANSCEIVER
LIN
0.1µF
0.1µF
0.01µF
0.01µF
Rx
Tx
470pF
470pF
BSP129
0.1µF
GPIO/JTAG
P0.0/URX
P0.1/UTX
GPIO/SPI
DVDDIO
REG3P3
REG2P5
ECHON
ECHOP
BURST
GATE5
DVDD
DGND
AVDD
0V
INTERFACE
MODULE
AGND
BURST ENABLE
2mV
P-P
BROWNOUT
POR/
Typical Application Circuit/Functional Diagram
LNA
RESET
BURST OUTPUT
DUTY CYCLE
WATCHDOG
AND PULSE
COUNTER
PLUS ACCUM
HW MULT
16 x 16
RAM
SIGMA-
DELTA
ADC
OSCILLATOR
13.5MHz
FLASH
ROM
RC
20pF
REFERENCE
BANDPASS
VOLTAGE
XIN
DIGITAL
FILTER
MAXQ20 RISC
OSCILLATOR
0.47µF
CRYSTAL
16MHz
µC
MAXQ7667
XOUT
20pF
REFBG
SCHEDULE
0.47µF
TIMER
RECTIFIER
FULL-
WAVE
REF
TIMER 2
FIFO
PROGRAMMABLE
CLOCK PRESCALER
DIVIDE BY 1 TO 128
LOWPASS
DIGITAL
FILTER
SAR ADC
12-BIT
PLL
TIMER 1
THRESHOLD
INTERRUPT
ADJUST
TIMER 0
AIN0
AIN1
AIN2
AIN3
AIN4
FILT
330pF
AVDD
24kΩ
33nF
BATTERY+
THERMISTOR