MAXQ7667AACM/V+ Maxim Integrated Products, MAXQ7667AACM/V+ Datasheet

MAXQ7667AACM/V+

Manufacturer Part Number

MAXQ7667AACM/V+

Description

IC MCU-BASED DAS 16BIT 48-LQFP

Manufacturer

Maxim Integrated Products

Series

MAXQ™r

Datasheet

1.MAXQ7667AACMV.pdf (40 pages)

Specifications of MAXQ7667AACM/V+

Core Processor

RISC

Core Size

16-Bit

Speed

16MHz

Connectivity

LIN, SPI, UART/USART

Peripherals

Brown-out Detect/Reset, POR, WDT

Number Of I /o

Program Memory Size

32KB (16K x 16)

Program Memory Type

FLASH

Ram Size

2K x 16

Voltage - Supply (vcc/vdd)

2.25 V ~ 2.75 V

Data Converters

A/D 5x12b

Oscillator Type

Internal

Operating Temperature

-40°C ~ 125°C

Package / Case

48-LQFP

Processor Series

MAXQ7667

Core

RISC

Data Bus Width

16 bit

Data Ram Size

4 KB

Interface Type

UART, JTAG, LIN

Maximum Clock Frequency

16 MHz

Number Of Programmable I/os

Number Of Timers

Operating Supply Voltage

5 V

Maximum Operating Temperature

+ 125 C

Mounting Style

SMD/SMT

Development Tools By Supplier

MAXQ7667EVKIT

Minimum Operating Temperature

- 40 C

On-chip Adc

12 bit, 5 Channel

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Eeprom Size

Lead Free Status / Rohs Status

Details

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The MAXQ7667 smart system-on-a-chip (SoC) provides a

time-of-flight ultrasonic distance-measuring solution. The

device is optimized for applications involving large dis-

tance measurement with weak input signals or multiple

target identification. The MAXQ7667 features high signal-

to-noise ratio achieved by combining flexible electronics

with the intelligence necessary to optimize each function

as environmental and target conditions change.

An integrated burst signal generator and echo reception

components process ultrasonic signals between 25kHz

and 100kHz. Echo reception components include a pro-

grammable gain low-noise amplifier (LNA), a 16-bit

sigma-delta ADC to digitize the received echo signals,

and digital signal processing (DSP). DSP limits noise

with a bandpass filter, and creates an echo envelope

through demodulation and lowpass filtering. Input

referred noise is a low 0.7µV

phase-locked loop (PLL) frequency synthesizer supplies

the reference frequency for the burst generator and the

clock for the echo receiver’s digital filter. An embedded

16-bit MAXQ20 microcontroller (µC) controls all the pre-

ceding functions.

The µC optimizes the burst frequency and reception

frequency for each transmission at any temperature.

The MAXQ7667 achieves smart sensing by monitoring

the echo signals and then actively changing the trans-

mitted and received parameters to obtain optimum

results. Digital filtering and burst synthesis do not

require CPU intervention. This leaves all the CPU power

available for echo optimization, communication, diag-

nostics, and additional signal processing.

The MAXQ7667 operates with three different power

supply voltages: +5V, +3.3V, and +2.5V. Two internal

linear regulators allow operation from a single +5V sup-

ply when three external power supplies are not avail-

able. Alternatively, the MAXQ7667 can control an

external pass transistor to allow operation from a single

supply voltage of +8V to +65V or more, depending on

the external component tolerance. The device is avail-

able in a 48-pin LQFP package and is specified to

operate from -40°C to +125°C.

19-4598; Rev 1; 7/09

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, go to: ww.maxim-ic.com/errata.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Automotive Parking

Vehicle Security

Industrial Processing

________________________________________________________________ Maxim Integrated Products

Ultrasonic Distance-Measuring System

General Description

16-Bit, RISC, Microcontroller-Based,

RMS

Automation

Handheld Devices

Applications

. A programmable

o Smart Analog Peripherals

o Timer/Digital I/O Peripherals

o High-Performance, Low-Power, 16-Bit RISC Core

o Program and Data Memory

o Crystal/Clock Module

o 16 x 16 Hardware Multiplier with 48-Bit

o Power-Management Module

o JTAG Interface

o Universal Asynchronous Receiver-Transmitter

o Local Interconnect Network (LIN)

See the Detailed Features section for complete list of features.

Note: All devices are specified over the -40°C to +125°C oper-

ating temperature range.

/V denotes an automotive qualified part.

+ Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configuration appears at end of data sheet.

MAXQ7667AACM/V+

Accumulator, Single Clock Cycle

(UART)

Dedicated Ultrasonic Burst Generator

Echo Receiving Path (Includes LNA, Sigma-

Delta ADC)

5-Channel, 12-Bit SAR ADC with 250ksps

Sampling Rate

Internal Bandgap Voltage Reference for the

ADCs (Also Accepts External Voltage Reference)

PART

Ordering Information

PIN-PACKAGE

48 LQFP

RAM

(KB)

Features

FLASH

(KB)

Related parts for MAXQ7667AACM/V+

MAXQ7667AACM/V+ Summary of contents

Page 1

... Universal Asynchronous Receiver-Transmitter (UART) o Local Interconnect Network (LIN) See the Detailed Features section for complete list of features. PART MAXQ7667AACM/V+ Note: All devices are specified over the -40°C to +125°C oper- ating temperature range. /V denotes an automotive qualified part. + Denotes a lead(Pb)-free/RoHS-compliant package. ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System ABSOLUTE MAXIMUM RATINGS DVDDIO, GATE5, REG3P3, REG2P5 to DGND ................................................................-0.3V to +6.0V AVDD to AGND .....................................................-0.3V to +4.0V DVDD to DGND .....................................................-0.3V to +3.0V DVDDIO to DVDD..................................................-0.3V to +6.0V AVDD to DVDD......................................................-0.3V to +4.0V ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System ELECTRICAL CHARACTERISTICS (continued +5V +3.3V; V DVDDIO AVDD DVDD ( 50kHz 1µF in parallel with 0.01µF, f BPF REFBG REF otherwise specified. Typical values ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System (V = +5V +3.3V, V DVDDIO AVDD DVDD unless otherwise noted.) BURST OUTPUT FREQUENCY vs. TEMPERATURE 50.05 USING PLL 50.04 50.03 50.02 50.01 50.00 49.99 49.98 49.97 49.96 49.95 -50 -25 0 ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System (V = +5V +3.3V, V DVDDIO AVDD DVDD unless otherwise noted.) SAR ADC GAIN ERROR vs. TEMPERATURE 3.0 2 3.3V AVDD 2 AVDD 1 3.6V ...

Page 11

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System (V = +5V +3.3V, V DVDDIO AVDD DVDD unless otherwise noted.) DVDDIO REGULATOR OUTPUT VOLTAGE vs. LOAD CURRENT 5.5 5.0 DRAIN = 14V 4.5 DRAIN = 8V 4.0 3.5 EXTERNAL VOLTAGE SOURCE ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System PIN NAME Port 1 Data 3/JTAG Serial Clock Input. P1 general-purpose digital I/O. TCK is the JTAG 1 P1.3/TCK serial test clock input. Refer to the MAXQ7667 User’s Guide Sections 5 and ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System PIN NAME Crystal Oscillator Output. Connect an external crystal or resonator between XIN and XOUT. Leave 21 XOUT XOUT unconnected when driving XIN with a 2.5V level clock or when an external clock source ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System TRANSDUCER BURST ENABLE BURST 0.01µF 470pF 0V 2mV 0.01µF ECHON 470pF ECHOP BSP129 DVDDIO 0.1µF GATE5 REG3P3 AVDD 0.1µF REG2P5 +8V TO +20V DVDD V+ 0.1µF DGND GND GPIO/JTAG INTERFACE P0.0/URX Rx MODULE LIN ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System Detailed Features o Smart Analog Peripherals Dedicated Ultrasonic Burst Generator Echo Receiving Path Low-Noise Amplifier Time Variable Gain Amplifier 16-Bit Sigma-Delta ADC Digital Bandpass Filter Full-Wave Rectifier and Digital Lowpass Filter 8-Deep, 16-Bit Wide ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System Detailed Description The ultrasonic distance-measurement peripherals in the MAXQ7667 include a burst signal generator for acoustic transmission and mixed signal circuits for amplifying and digitizing echo signals ranging between 25kHz and 100kHz. The burst ...

Page 17

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System Echo Receive Path Low-Noise Amplifier (LNA) The LNA provides a 40V/V fixed gain to the input signal. The differential inputs of the LNA are ECHOP and ECHON. For proper biasing of the LNA, AC-couple ...

Page 18

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System The MAXQ7667 features a 16-bit sigma-delta ADC with an analog gain adjustable from 38dB to 60dB (includ- ing the fixed LNA gain) with a maximum gain step of 12.5% (typical). Gain changes settle within ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System output to the FIFO automatically each time the lowpass filter output updates, through the control of one of the timer outputs, or through software. The device includes a FIFO depth counter with programmable interrupt ...

Page 20

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System SAR ADC Analog Input Track-and-Hold (T/H) Figures 6 and 7 show the equivalent input circuit of the MAXQ7667 analog input architecture. During acquisi- tion (track), a sampling capacitor charges to the posi- tive input ...

Page 21

... The MAXQ7667 supports the following master clock sources: • Internal high-frequency oscillator drives an exter- nal 1MHz–16MHz crystal or ceramic resonator MAXQ is a registered trademark of Maxim Integrated Products, Inc. ______________________________________________________________________________________ • Internal, fast-starting, 13.5MHz RC oscillator (default oscillator at startup and in the event the external crystal fails) ® ...

Page 22

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System SCNT.0:STIME SCNT.11:STDIV2 PROGRAMMABLE SYSTEM DIVIDE BY CLOCK ..., 128 P1.7/SYNC SCNT.8:SSYNC_EN CLR Figure 8. Schedule-Timer Module Block Diagram CAPTURE INPUT CONDITIONING CLOCK SCALING GATING Figure 9. Type 2 Timer/Counter in 16-Bit ...

Page 23

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System The joint test action group (JTAG) IEEE 1149.1 standard defines a unique method for in-circuit testing and pro- gramming. The MAXQ7667 conforms to this standard, implementing an external test access port (TAP) and internal ...

Page 24

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System The following four digital I/Os form the TAP interface: • TDO—Serial output signal for test instruction and data. Data transitions on the falling edge of TCK. TDO idles high when inactive. TDO serially trans- ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System SHIFT SS SCLK CKPOL/CKPHA 0/1 OR 1/0 SCLK CKPOL/CKPHA 0/0 OR 1/1 MOSI MISO Figure 11. SPI Timing Diagram in Master Mode SHIFT t SSE SS SCLK CKPOL/CKPHA 0/1 OR 1/0 SCLK CKPOL/CKPHA 0/0 ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System MAXQ7667 PD0._ MUX SF DIRECTION SF ENABLE PR0._ PO0._ MUX SF OUTPUT PS0._ PI0 INPUT FLAG Figure 13. Port 0 Digital I/O Basic Circuitry. Port 1 Circuitry is the Same as Port ...

Page 27

RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System not externally forced low. An internal POR flag indicates the source of a reset. Ramp up the DVDD supply at a minimum rate of 60mV/ms to keep the device in POR until DVDD fully ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System memory. Access physical memory segments (other than the stack and register memories) as either pro- gram memory or data memory, but not both at once. By default, the memory is arranged in a Harvard ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System the application code executes. The application codes initiate reprogramming. If the password is not set, the MAXQ7667 monitors the UART for an autobaud char- acter (0x0D). If this character is received, the device sets ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System Table 1. System Register Map REGISTER INDEX AP (8h) A (9h APC 2h — 3h — 4h PSF IMR 7h — — Ah — A[10] ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System ______________________________________________________________________________________ 31 ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System 32 ______________________________________________________________________________________ ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System Table 3. Peripheral Register Map REGISTER INDEX M0 (0h) 0h PO0 1h PO1 2h — 3h EIF0 4h EIF1 5h — 6h — 7h — 8h PI0 9h PI1 Ah — Bh EIE0 Ch ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System 34 ______________________________________________________________________________________ ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System ______________________________________________________________________________________ 35 ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System 36 ______________________________________________________________________________________ ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System ______________________________________________________________________________________ 37 ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System 38 ______________________________________________________________________________________ ...

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RISC, Microcontroller-Based, Ultrasonic Distance-Measuring System Applications Information Development and Technical Support A variety of highly versatile, affordably priced develop- ment tools for this µC are available from Maxim and third-party suppliers, including: – Compilers – Evaluation kit – Integrated ...

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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 40 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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