MAXQ61HA-0000+ MAXIM [Maxim Integrated Products], MAXQ61HA-0000+ Datasheet - Page 9

• Manufacturer Part Number: MAXQ61HA-0000+
• Description: 16-Bit Microcontroller with Infrared Module
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAXQ61H microcontroller provides integrated,
low-cost solutions that simplify the design of IR commu-
nications equipment such as universal remote controls.
Standard features include the highly optimized, single-
cycle, MAXQ 16-bit RISC core, 36KB of user ROM
memory, 1.28KB data RAM, a soft stack, 16 general-
purpose registers, and three data pointers. The MAXQ
core offers the industry’s best MIPS/mA rating, allowing
developers to achieve the same performance as com-
peting microcontrollers at substantially lower clock
rates. Combining reduced active-mode current with the
MAXQ61H stop-mode current (0.2µA, typical) results in
increased battery life. Application-specific peripherals
include flexible timers for generating IR carrier frequen-
cies and modulation, a high-current IR drive pin capa-
ble of sinking up to 25mA current, and output pins
capable of sinking up to 5mA ideal for IR applications,
general-purpose I/O pins ideal for keypad matrix input,
and a power-fail-detection circuit to notify the applica-
tion when the supply voltage is nearing the minimum
operating voltage of the microcontroller.
At the heart of the MAXQ61H is the MAXQ 16-bit RISC
core. The MAXQ61H operates from DC to 12MHz and
almost all instructions execute in a single clock cycle
(83.3ns at 12MHz), enabling nearly 12MIPS true code
operation. When active device operation is not
required, an ultra-low-power stop mode can be invoked
from software, resulting in quiescent current consump-
tion of less than 0.2µA (typ) and 2.0µA (max). The com-
bination of high-performance instructions and ultra-low
16-BIT TIMER
REGULATOR
MONITOR
VOLTAGE
GPIO
16-Bit Microcontroller with Infrared Module
1.024KB ROM
16-BIT TIMER
_______________________________________________________________________________________
WATCHDOG
CLOCK
Detailed Description
16-BIT MAXQ
MAXQ61H
RISC CPU
36KB USER ROM
SECURE MMU
1.28KB SRAM
8kHz NANO
Block Diagram
RING
IR DRIVER
IR TIMER
stop-mode current increases battery life over compet-
ing microcontrollers. An integrated POR circuit with
brownout support resets the device to a known condi-
tion following a power-up cycle or brownout condition.
Additionally, a power-fail warning flag is set and a
power-fail interrupt can be generated when the system
voltage falls below the power-fail warning voltage,
V
cation to notify the user that the system supply is low
and appropriate action should be taken.
The MAXQ61H is based on Maxim’s low-power, 16-bit
MAXQ family of RISC cores. The core supports the
Harvard memory architecture with separate 16-bit pro-
gram and data address buses. A fixed 16-bit instruction
word is standard, but data can be arranged in 8 or 16
bits. The MAXQ core in the MAXQ61H family is imple-
mented as a pipelined processor with performance
approaching 1MIPS/MHz. The 16-bit data path is imple-
mented around register modules, and each register
module contributes specific functions to the core. The
accumulator module consists of sixteen 16-bit registers
and is tightly coupled with the arithmetic logic unit
(ALU). A configurable soft stack supports program flow.
Execution of instructions is triggered by data transfer
between functional register modules or between a func-
tional register module and memory. Because data
movement involves only source and destination mod-
ules, circuit-switching activities are limited to active
modules only. For power-conscious applications, this
approach localizes power dissipation and minimizes
switching noise. The modular architecture also provides
a maximum of flexibility and reusability that is important
for a microprocessor used in embedded applications.
The MAXQ instruction set is highly orthogonal. All arith-
metical and logical operations can use any register in
conjunction with the accumulator. Data movement is
supported from any register to any other register.
Memory is accessed through specific data-pointer reg-
isters with automatic increment/decrement support.
The MAXQ61H incorporates several memory types that
include the following:
• 36KB user ROM
• 1.28KB SRAM data memory
• 1.024KB utility ROM
• Soft stack
PFW
. The power-fail warning feature allows the appli-
Microprocessor
Memory
9