19-3217; Rev 1; 10/08
16-Bit RISC Microcontroller-Based
Smart Data-Acquisition Systems
–MAXQ765D
Three Independent Data Pointers with Automatic
Increment/Decrement
General Description
The MAXQ7665A–MAXQ7665D smart systems-on-a-chip
(SoC) are data-acquisition systems based on a micro-
controller (µC). As members of the MAXQ® family of 16-
bit, reduced instruction set computing (RISC) µCs, the
MAXQ7665A–MAXQ7665D are ideal for low-cost, low-
power, embedded applications such as automotive,
industrial controls, and building automation. The flexible,
modular architecture design used in these µCs allows
development of targeted products for specific applica-
tions with minimal effort.
♦ Program and Data Memory
Up to 128KB (64K x 16) Internal Flash
512 Bytes (256 x 16) Internal RAM
♦ Smart Analog Peripherals
Low-Power, Eight Differential-Channel,
12-Bit, 500ksps ADC
Programmable-Gain Amplifier, 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
♦ Timer/Digital I/O Peripherals
Full CAN 2.0B Controller
The MAXQ7665A–MAXQ7665D incorporate a high-per-
formance 16-bit RISC core, a 12-bit 500ksps SAR ADC
with a programmable gain amplifier (PGA), and a full
CAN 2.0B controller supporting transfer rates up to
1Mbps. These devices include a 12-bit DAC with a
buffered voltage output and on-chip oscillator circuitry
to operate from an external high frequency (8MHz)
crystal. There is also a built-in internal RC oscillator as
an alternative to using an external crystal. The
MAXQ7665A–MAXQ7665D contain an internal tempera-
ture sensor to measure die temperature and a remote
temperature-sensor driver. The analog functions and
digital I/O are powered from a +5V supply, while the
internal digital core is powered from +3.3V, which can
be supplied by an on-chip linear regulator. These
devices also include a dual power-supply supervisor
with reset and a JTAG interface for in-system program-
ming and debugging. The 16-bit RISC µC includes up
to 128KB (64K x 16) of flash memory and 512 bytes
(256 x 16) of RAM.
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/O Pins, with External
Interrupt Capability
All Interrupts Can Be Used as a Wake-Up
♦ Crystal/Clock Module
Internal Oscillator for Use with External Crystal
On-Chip RC Oscillator Eliminates External Crystal
External Clock-Source Operation
The MAXQ7665A–MAXQ7665D are available in a 7mm x
7mm 48-pin TQFN package and are specified to operate
from -40°C to +125°C.
Programmable Watchdog Timer
♦ Power-Management Module
Power-On Reset (POR)
Power-Supply Supervisor/Brownout Detection for Digital
I/O and Digital Core Supplies
Applications
Automotive Steering Sensors
On-Chip +3.3V, 50mA Linear Regulator
♦ JTAG Interface
CAN- and LIN-Based Automotive Sensors
Industrial Control
Extensive Debug and Emulation Support
In-System Test Capability
Flash-Memory-Program Download
Software Bootstrap Loader for Flash Programming
♦ Ultra-Low-Power Consumption
Low-Power, Stop Mode (CPU Shutdown)
Features
♦ High-Performance, Low-Power, 16-Bit RISC Core
8MHz Operation, Approaching 1MIPS per MHz
Low Power (< 3mA/MIPS, DV
= +3.3V)
DD
16-Bit Instruction Word, 16-Bit Data Bus
33 Instructions (Most Require Only One Clock Cycle)
16-Level Hardware Stack
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.
________________________________________________________________ Maxim Integrated Products
1
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.
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