MAXQ7666 Datasheet, PDF (1/49 Pages) Maxim Integrated Products – 16-Bit, RISC, Microcontroller-Based, Smart Data-Acquisition System

19-4257; Rev 0; 8/08
16-Bit, RISC, Microcontroller-Based,
Smart Data-Acquisition System
General Description
The MAXQ7666 smart systems-on-a-chip (SoC) is a
data-acquisition system based on a microcontroller (µC).
As a member of the MAXQ^® family of 16-bit reduced
instruction set computing (RISC) µCs, the MAXQ7666 is
ideal for low-cost, low-power, embedded applications
such as automotive, industrial controls, and building
automation. The flexible, modular architecture design
used in this µC allows targeted product development for
specific applications with minimal effort.
The MAXQ7666 incorporates a high-performance 16-bit
RISC core, a 12-bit 500ksps SAR ADC with a program-
mable-gain amplifier (PGA), a 12-bit DAC with a buffered
voltage output, and a full CAN 2.0B controller, supporting
transfer rates up to 1Mbps. The device includes an inter-
nal crystal oscillator that drives an external crystal of
8MHz for the system clock. An internal 7.6MHz RC oscil-
lator provides an alternate system clock. The MAXQ7666
includes an internal temperature sensor to measure die
temperature and an external temperature-sensor driver.
The analog functions and digital I/O operate from a +5V
supply, while the internal digital core operates from a
+3.3V supply. An internal linear regulator can provide
+3.3V to the digital supply if an external +3.3V supply is
not available. The MAXQ7666 also includes two power-
supply supervisors and a JTAG interface for in-system
programming and debugging. The device includes 16KB
(8K x 16) of program flash memory, up to 512 bytes (256
x 16) of data flash, and 512 bytes (256 x 16) of RAM.
The MAXQ7666 is available in a 48-pin TQFN (7mm x
7mm) package and is specified to operate from -40°C to
+125°C.
Applications
Automotive Steering Sensors
CAN- and LIN-Based Automotive Sensors
Industrial Control
Features
o High-Performance, Low-Power, 16-Bit RISC Core
8MHz Operation, Approaching 1MIPS per MHz
Low Power (< 3mA/MIPS, DV_DD = +3.3V)
16-Bit Instruction Word, 16-Bit Data Bus
33 Instructions (Most Require Only One Clock Cycle)
16-Level Hardware Stack
Three Independent Data Pointers with Automatic
Increment/Decrement
o Program and Data Memory
16KB (8K x 16) Program Flash
Up to 512 Bytes (256 x 16) Data Flash
512 Bytes (256 x 16) RAM
o Smart Analog Peripherals
Low-Power, Eight Differential-Channel,
12-Bit, 500ksps ADC
PGA, Software-Selectable Gain:
1V/V, 2V/V, 4V/V, 8V/V, 16V/V, 32V/V
12-Bit DAC with Buffered Voltage Output
External References for ADC and DAC
Internal (Die) and External Diode Temperature Sensing
o Timer/Digital I/O Peripherals
Full CAN 2.0B Controller
15 Message Centers (256-Byte Dual Port Memory)
Programmable Bit Rates from 10kbps to 1Mbps
Standard 11-Bit or Extended 29-Bit Identification
Modes
Two Data Masks and Associated IDs for DeviceNET™,
SDS, and Other Higher Layer CAN Protocols
External Transmit Disable for Autobaud
SIESTA Low-Power Mode
Wake-Up on CANRXD Edge Transition
UART (LIN) with User-Programmable Baud Rate
16 x 16 Hardware Multiplier with 48-Bit Accumulator,
Single Clock-Cycle Operation
Three 16-Bit (or Six 8-Bit) Programmable
Timer/Counter/PWM
Eight General-Purpose, Digital I/Os, with External
Interrupt Capability
Wake-Up Capable Interrupts
o Crystal/Clock Module
Internal Oscillator for Use with External Crystal
Internal RC Oscillator Eliminates External Crystal
External Clock-Source Operation
Programmable Watchdog Timer
o Power-Management Module
Power-On Reset (POR)
Power-Supply Supervisor/Brownout Detection for Digital
I/O and Digital Core Supplies
On-Chip +3.3V, 50mA Linear Regulator
o JTAG Interface
Extensive Debug and Emulation Support
In-System Test Capability
Flash-Memory-Program Download
Software Bootstrap Loader for Flash Programming
o Low-Power Consumption
Low-Power Stop Mode (CPU Shutdown)
Ordering Information and Pin Configuration appear at end
of data sheet.
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
DeviceNet is a trademark of Open DeviceNet Vendor Association, Inc.
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: www.maxim-ic.com/errata.
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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.