19-4604; Rev 3; 3/12
16-Bit Microcontroller with Infrared Module
General Description
The MAXQ61H is a low-power, 16-bit MAXQ
®
micro-
controller designed for low-power applications includ-
ing universal remote controls, consumer electronics,
and white goods. The MAXQ61H combines a powerful
16-bit RISC microcontroller and integrated peripherals
including an IR module with carrier frequency genera-
tion and flexible port I/O capable of multiplexed keypad
control.
The MAXQ61H includes 36KB of ROM memory and
1.28KB of data SRAM.
For the ultimate in low-power battery-operated perfor-
mance, the MAXQ61H includes an ultra-low-power stop
mode (0.2µA, typ). In this mode, the minimum amount
of circuitry is powered. Wake-up sources include exter-
nal interrupts, the power-fail interrupt, and a timer inter-
rupt. The microcontroller runs from a wide 1.70V to 3.6V
operating voltage.
Features
o
High-Performance, Low-Power 16-Bit RISC Core
o
DC to 12MHz Operation Across Entire Operating
Range
o
1.70V to 3.6V Operating Voltage Range
o
33 Total Instructions for Simplified Programming
o
Three Independent Data Pointers Accelerate Data
Movement with Automatic Increment/Decrement
o
Dedicated Pointer for Direct Read from Code Space
o
16-Bit Instruction Word, 16-Bit Data Bus
o
16 x 16-Bit General-Purpose Working Registers
o
Memory Features
36KB ROM
1.28KB Data SRAM
o
Additional Peripherals
Power-Fail Warning
Power-On Reset/Brownout Reset
Automatic IR Carrier Frequency Generation and
Modulation
Two 16-Bit, Programmable Timers/Counters with
Prescaler and Capture/Compare
Programmable Watchdog Timer
8kHz Nanopower Ring Oscillator Wake-Up Timer
Up to 24 (MAXQ61HA) General-Purpose I/Os
o
Low Power Consumption
0.2µA (typ), 2.0µA (max) in Stop Mode
T
A
= +25°C, Power-Fail Monitor Disabled
2.0mA (typ) at 12MHz in Active Mode
MAXQ61H
Applications
Remote Controls
Battery-Powered Portable Equipment
Consumer Electronics
Home Appliances
White Goods
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
PART
MAXQ61HA-0000+
MAXQ61HX-0000+*
TEMP RANGE
0°C to +70°C
0°C to +70°C
OPERATING
VOLTAGE (V)
1.70 to 3.6
1.70 to 3.6
PROGRAM
MEMORY (KB)
36 ROM
36 ROM
DATA MEMORY
(KB)
1.28
1.28
PIN-PACKAGE
32 TQFN-EP**
Bare die
Note:
Contact factory for information about masked ROM devices.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*Contact
factory for availability.
**EP
= Exposed pad.
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
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.
16-Bit Microcontroller with Infrared Module
MAXQ61H
TABLE OF CONTENTS
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Recommended DC Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Stack Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Utility ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
IR Carrier Generation and Modulation Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Carrier Generation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
IR Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
IR Transmit—Independent External Carrier and Modulator Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
IR Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Carrier Burst-Count Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
16-Bit Timers/Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
General-Purpose I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
On-Chip Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Power-Fail Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Grounds and Bypassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Development and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2
_______________________________________________________________________________________
16-Bit Microcontroller with Infrared Module
MAXQ61H
LIST OF FIGURES
Figure 1. IR Transmit Frequency Shifting Example (IRCFME = 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 2. IR Transmit Carrier Generation and Carrier Modulator Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 3. IR Transmission Waveform (IRCFME = 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 4. External IRTXM (Modulator) Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 5. IR Capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 6. Receive Burst-Count Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 7. On-Chip Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 8. Power-Fail Detection During Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 9. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 10. Stop Mode Power-Fail Detection with Power-Fail Monitor Disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LIST OF TABLES
Table 1. Watchdog Interrupt Timeout (Sysclk = 12MHz, CD[1:0] = 00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Table 2. Power-Fail Detection States During Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Table 3. Stop Mode Power-Fail Detection States with Power-Fail Monitor Enabled . . . . . . . . . . . . . . . . . . . . . . . . . .19
Table 4. Stop Mode Power-Fail Detection States with Power-Fail Monitor Disabled . . . . . . . . . . . . . . . . . . . . . . . . . .20
_______________________________________________________________________________________
3
16-Bit Microcontroller with Infrared Module
MAXQ61H
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V
DD
with Respect to GND .......-0.3V to +3.6V
Voltage Range on Any Lead with Respect
to GND except V
DD .....................................
-0.3V to (V
DD
+ 0.5V)
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
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.
RECOMMENDED DC OPERATING CONDITIONS
(V
DD
= V
RST
to 3.6V, T
A
= 0°C to +70°C.) (Note 1)
PARAMETER
Supply Voltage
1.8V Internal Regulator
Power-Fail Warning Voltage for
Supply (Note 2)
Power-Fail Reset Voltage
(Note 3)
Power-On Reset Voltage
RAM Data-Retention Voltage
Active Current (Note 5)
SYMBOL
V
DD
V
REG18
V
PFW
V
RST
V
POR
V
DRV
I
DD_1
I
S1
Stop-Mode Current
I
S2
Current Consumption During
Power-Fail
Power Consumption During
Power-On Reset
Stop-Mode Resume Time
Power-Fail Monitor Startup Time
Power-Fail Warning Detection
Time
Input Low Voltage for IRTX,
IRRX,
RESET,
and All Port Pins
Input High Voltage for IRTX,
IRRX,
RESET,
and All Port Pins
Input Hysteresis (Schmitt)
Input Low Voltage for HFXIN
I
PFR
I
POR
t
ON
t
PRM_ON
t
PFW
V
IL
V
IH
V
IHYS
V
IL_HFXIN
V
GND
(Note 4)
(Notes 4, 8)
10
V
GND
0.7 x
V
DD
300
0.3 x
V
DD
0.3 x
V
DD
V
DD
Power-Fail On
(Notes 4, 6)
(Note 7)
Monitors V
DD
Monitors V
DD
Monitors V
DD
(Note 4)
Sysclk = 12MHz
Power-Fail Off
T
A
= +25°C
T
A
= 0°C to +70°C
T
A
= +25°C
T
A
= 0°C to +70°C
CONDITIONS
MIN
V
RST
1.62
1.75
1.64
1.0
1.0
2.5
0.15
0.15
22
27.6
3.75
2.0
8
31
38
µA
nA
µs
µs
µs
V
V
mV
V
µA
1.8
1.8
1.67
TYP
MAX
3.6
1.98
1.85
1.70
1.45
UNITS
V
V
V
V
V
V
mA
[(3 x I
S2
) + ((PCI - 3) x
(I
S1
+ I
NANO
))]/PCI
100
375 + 8192t
HFXIN
150
4
_______________________________________________________________________________________
16-Bit Microcontroller with Infrared Module
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= V
RST
to 3.6V, T
A
= 0°C to +70°C.) (Note 1)
PARAMETER
Input High Voltage for HFXIN
IRRX Input Filter Pulse-Width
Reject
IRRX Input Filter Pulse-Width
Accept
Output Low Voltage for IRTX
SYMBOL
V
IH_HFXIN
t
IRRX_R
t
IRRX_A
V
DD
= 3.6V, I
OL
= 25mA (Note 4)
V
OL_IRTX
V
DD
= 2.35V, I
OL
= 10mA (Note 4)
V
DD
= 1.85V, I
OL
= 4.5mA
V
DD
= 3.6V, I
OL
= 11mA (Note 4)
V
DD
= 2.35V, I
OL
= 8mA (Note 4)
V
DD
= 1.85V, I
OL
= 4.5mA
Output High Voltage for IRTX and
All Port Pins
Input/Output Pin Capacitance for
All Port Pins
Input Leakage Current
Input Pullup Resistor for
RESET,
IRTX, IRRX, and All Port Pins
EXTERNAL CRYSTAL/RESONATOR
Crystal/Resonator
Crystal/Resonator Period
Crystal/Resonator Warmup Time
Oscillator Feedback Resistor
EXTERNAL CLOCK INPUT
External Clock Frequency
External Clock Period
External Clock Duty Cycle
System Clock Frequency
System Clock Period
NANOPOWER RING OSCILLATOR
Nanopower Ring Oscillator
Frequency
Nanopower Ring Oscillator Duty
Cycle
Nanopower Ring Oscillator
Current
f
NANO
t
NANO
I
NANO
T
A
= +25°C
T
A
= +25°C, V
DD
= POR voltage (Note 4)
(Note 4)
Typical at V
DD
= 1.64V, T
A
= +25°C
(Note 4)
3.0
1.7
40
40
8.0
2.4
60
400
20.0
kHz
%
nA
f
XCLK
t
XCLK
t
XCLK_DUTY
f
CK
t
CK
HFXOUT = GND
45
f
HFIN
f
XCLK
1/f
CK
DC
1/f
XCLK
55
12
MHz
ns
%
MHz
MHz
f
HFXIN
t
HFXIN
t
XTAL_RDY
R
OSCF
From initial oscillation
(Note 4)
0.5
DC
1/f
HFXIN
8192 x t
HFXIN
1.0
1.5
12
MHz
ns
ms
M
V
OH
C
IO
I
L
R
PU
I
OH
= -2mA
(Note 4)
Internal pullup disabled
V
DD
= 3.0V, V
OL
= 0.4V (Note 4)
V
DD
= 2.0V, V
OL
= 0.4V
-100
16
17
28
30
V
DD
-
0.5
0.4
0.4
0.4
300
1.0
1.0
1.0
0.5
0.5
0.5
V
DD
15
+100
39
41
V
pF
nA
k
V
V
CONDITIONS
MIN
0.7 x
V
DD
TYP
MAX
V
DD
50
UNITS
V
ns
ns
MAXQ61H
Output Low Voltage for
RESET
and All Port Pins (Note 9)
V
OL
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