The MAXQ3212 microcontroller is a low-power, 16-bit
RISC device that incorporates an analog comparator
and a high-current I/O pin for directly driving an LED.
The device is uniquely suited for cost-conscious appli-
cations such as battery-powered devices, system moni-
tors, and white goods, but can be used in any
application that requires high performance and low-
power operation. The high-performance 16-bit
RISC MAXQ
®
core and 8-bit accumulators are comple-
mented by standard amenities such as timers and digi-
tal I/O. The power consumption per MIPS ratio is
among the best in the 16-bit microcontroller industry.
Features
♦
High-Performance, Low-Power, 16-Bit RISC Core
DC to 3.58MHz Operation, Approaching 1MIPS
per MHz
+5V ±10% Operation
Up to 15 General-Purpose I/O Pins
33 Instructions, Most Single-Cycle
Two Independent Data Pointers Accelerate Data
Movement with Automatic Increment/Decrement
Two Loop Counters
4-Level Hardware Stack
16-Bit Instruction Word, 16-Bit Data Bus
16 x 8-Bit Accumulators
16 x 16 General-Purpose Working Registers
Optimized for C Compiler (High-Speed/Density
Code)
JTAG-Like Debug/Visibility Port
♦
Program and Data Memory
1kWord EEPROM Program Memory, Mask ROM
for High-Volume Applications
128 Bytes EEPROM Data Memory
60,000 EEPROM Write/Erase Cycles
64 Bytes SRAM Data Memory
In-System Programming
♦
Peripheral Features
16-Bit Programmable Timer/Counter with Prescaler
High-Current I/O Pin Suitable for LED Drive
Programmable Watchdog Timer
Selectable Power-Fail Reset
Power-On Reset (POR)
Wake-Up Timer
Internal 8kHz Ring Oscillator
♦
Flexible Programming Interface
Bootloader Simplifies Programming
In-System Programming Through JTAG
Supports In-Application Programming of EEPROM
Memory
♦
Ultra-Low-Power Consumption
2.7µA Stop Mode Current (typ)
Low-Power Divide-by-256 Mode
♦
Analog Features
Analog Comparator Uses Internal or External Voltage
Reference
+2.5V Reference Output Available
1
MAXQ3212
Applications
Gas and Chemical Sensors
Environmental Systems
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Industrial Control
Home Appliances
Pin Configuration
TOP VIEW
GND 1
V
REF
/P0.4 2
CMP0/P0.3 3
T2P/P0.2 4
T2PB/P0.1 5
P0.0 6
P1.6 7
P1.5 8
TDO/P1.4 9
TCK/P1.3 10
HFXIN 11
HFXOUT 12
24 CMPI/P0.5
23 INT/P0.6
22 LED/P0.7
21 TDI/P1.0
MAXQ3212
20 RESET/P1.1
19 TMS/P1.2
18 V
DD
17 V
DD
16 N.C.
15 GND
14 N.C.
13 GND
PDIP/TSSOP
Typical Operating Circuit and Ordering Information appear
at end of data sheet.
MAXQ is a registered trademark of Maxim Integrated Products, 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
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Microcontroller with Analog Comparator
and LED Driver
MAXQ3212
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Digital I/O Pin
Relative to Ground
........................................
-0.5V to (V
DD
+ 0.5V)
Voltage Range on Any Analog I/O Pin
Relative to Ground...................................-0.5V to (V
DD
+ 0.5V)
Voltage Range on V
DD
Relative to Ground ...........-0.5V to +6.0V
Continuous Output Current (any single I/O pin) .................25mA
Continuous Output Current (all I/O pins combined) ...........25mA
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020 Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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