Rainbow Electronics MAXQ7670 - Manual

General Description
The MAXQ7670 is a highly integrated solution for mea-
suring multiple analog signals and outputting the results
on a control area network (CAN) bus. The device oper-
ates from a single 5V supply and incorporates a high-
performance, 16-bit reduced instruction set computing
(RISC) core, a SAR ADC, and a CAN 2.0B controller,
supporting transfer rates up to 1Mbps. The 10-bit SAR
ADC includes an amplifier with programmable gains of
1V/V or 16V/V, 8 input channels, and conversion rates up
to 250ksps. The eight single-ended ADC inputs can be
configured as four unipolar or bipolar, fully differential
inputs. For single-supply operation, the external 5V sup-
ply powers the digital I/Os and two separate integrated
linear regulators that supply the 2.5V digital core and the
3.3V analog circuitry. Each supply rail has a dedicated
power-supply supervisor that provides brownout detec-
tion and power-on reset (POR) functions. The 16-bit RISC
microcontroller (µC) includes 64KB (32K x 16) of non-
volatile program/data flash and 2KB (1K x 16) of data
RAM. Other features of the MAXQ7670 include a 4-wire
SPI™ interface, a JTAG interface for in-system program-
ming and debugging, an integrated 15MHz RC oscilla-
tor, external crystal oscillator support, a timer/counter
with pulse-width modulation (PWM) capability, and seven
GPIO pins with interrupt and wake-up capability.
The system-on-a-chip (SoC) MAXQ7670 is a µC-based,
smart data acquisition system. As a member of the
MAXQ
® family of 16-bit, RISC µCs, the MAXQ7670 is
ideal for low-cost, low-power, embedded-applications
such as automotive, industrial controls, and building
automation. The flexible, modular architecture used in
the MAXQ µCs allows development of targeted prod-
ucts for specific applications with minimal effort.
The MAXQ7670 is available in a 40-pin, 5mm x 5mm
TQFN package, and is specified to operate over the -40°C
to +125°C automotive temperature range.
Applications
Automotive Steering Angle and Torque Sensors
CAN-Based Automotive Sensor Applications
Industrial Control
Building Automation
Features
♦ High-Performance, Low-Power, 16-Bit RISC Core
0.166MHz to 16MHz Operation, Approaching
1MIPs/MHz
Low Power (< 1mA/MIPS, V
DVDD = +2.5V)
16-Bit Instruction Word, 16-Bit Data Bus
33 Instructions, Most Require Only One Clock
Cycle
16-Level Hardware Stack
16 x 16-Bit, General-Purpose Working Registers
Three Independent Data Pointers with Auto-
Increment/Decrement
Low-Power, Divide-by-256, Power-Management
Modes (PMM) and Stop Mode
♦ Program and Data Memory
64KB Internal Nonvolatile Program/Data Flash
2KB Internal Data RAM
♦ SAR ADC
8 Single-Ended/4 Differential Channels,
10-Bit Resolution with No Missing Codes
PGA Gain = 1V/V or 16V/V
250ksps (150.9ksps with PGA Gain = 16V/V)
♦ Timer/Digital I/O Peripherals
CAN 2.0B Controller (15 Message Centers)
Serial Peripheral Interface (SPI)
JTAG Interface (Extensive Debug and Emulation
Support)
Single 16-Bit/Dual 8-Bit Timer/PWM
Seven General-Purpose, Digital I/O Pins with
External Interrupt/Wake-Up Features
♦ Oscillator/Clock Module
Internal Oscillator Supports External Crystal
(8MHz or 16MHz)
Integrated 15MHz RC Oscillator
External Clock Source Operation
Programmable Watchdog Timer
♦ Power-Management Module
Power-On Reset
Power-Supply Supervisor/Brownout Detection
Integrated +2.5V and +3.3V Linear Regulators
MAXQ7670
Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface
________________________________________________________________ Maxim Integrated Products 1
19-4384; Rev 0; 11/08
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.
Typical Application Circuit and Pin Configuration appear at
end of data sheet.
SPI is a trademark of Motorola, Inc.
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAXQ7670ATL+ -40°C to +125°C 40 TQFN-EP*
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
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:
http://www.maxim-ic.com/errata .