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PDF MAXQ614 Data sheet ( Hoja de datos )
| Número de pieza | MAXQ614 | |
| Descripción | 16-Bit Microcontroller | |
| Fabricantes | Maxim Integrated | |
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MAXQ614
16-Bit Microcontroller with Infrared Module
General Description
The MAXQ614 is a low-power, 16-bit MAXQ® microcon-
troller designed for low-power applications including
universal remote controls, consumer electronics, and
white goods. The device combines a powerful 16-bit
RISC microcontroller and integrated peripherals includ-
ing two universal synchronous/asynchronous receiver-
transmitters (USARTs) along with an IR module with car-
rier frequency generation and flexible port I/O capable of
multiplexed keypad control.
The device includes 80KB of flash memory and 2KB of
data SRAM.
For the ultimate in low-power battery-operated perfor-
mance, the device includes an ultra-low-power stop mode
(0.2µA typ). In this mode, the minimum amount of circuitry
is powered. Wake-up sources include external interrupts,
the power-fail interrupt, and a timer interrupt. The micro-
controller runs from a wide 1.70V to 3.6V operating voltage.
Applications
Remote Controls
Battery-Powered Portable Equipment
Consumer Electronics
Home Appliances
White Goods
Block Diagram
MAXQ614
REGULATOR
VOLTAGE
MONITOR
GPIO
2x
16-BIT TIMER
16-BIT MAXQ
RISC CPU
CLOCK
80KB FLASH
MEMORY
WATCHDOG
1.5KB
UTILITY ROM
8kHz NANO
RING
2KB
DATA SRAM
IR DRIVER
IR TIMER
2 x USART
Features
S High-Performance, Low-Power, 16-Bit RISC Core
S DC to 12MHz Operation Across Entire Operating Range
S 1.70V to 3.6V Operating Voltage
S 33 Total Instructions for Simplified Programming
S Three Independent Data Pointers Accelerate Data
Movement with Automatic Increment/Decrement
S Dedicated Pointer for Direct Read from Code Space
S 16-Bit Instruction Word, 16-Bit Data Bus
S 16 x 16-Bit General-Purpose Working Registers
S Memory Features
80KB Flash Memory
2KB Data SRAM
S Additional Peripherals
Power-Fail Warning
Power-On Reset (POR)/Brownout Reset
Automatic IR Carrier Frequency Generation
and Modulation
Two 16-Bit Programmable Timers/Countershttp://www.DataSheet4U.net/
with Prescaler and Capture/Compare
Two USART Ports
Programmable Watchdog Timer
8kHz Nanopower Ring Oscillator Wake-Up Timer
Up to 16 General-Purpose I/Os
S Low Power Consumption
0.2µA (typ), 2.0µA (max) in Stop Mode,
TA = +25NC, Power-Fail Monitor Disabled
2.5mA (typ) at 12MHz in Active Mode
Ordering Information appears 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.maximintegrated.com/errata.
For information on other Maxim products, visit Maxim’s
website at www.maximintegrated.com.
19-6374; Rev 2; 10/12
datasheet pdf - http://www.DataSheet4U.net/
1 page  
MAXQ614
16-Bit Microcontroller with Infrared Module
RECOMMENDED OPERATING CONDITIONS (continued)
(VDD = VRST to 3.6V, TA = -20NC to +70NC, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Output Low Voltage for IRTX
Output Low Voltage for RESET
and All Port Pins (Note 9)
Output High Voltage for IRTX
and All Port Pins
VOL_IRTX
VOL
VOH
VDD = 3.6V, IOL = 25mA (Note 4)
VDD = 2.35V, IOL = 10mA (Note 4)
VDD = 1.85V, IOL = 4.5mA
VDD = 3.6V, IOL = 11mA (Note 4)
VDD = 2.35V, IOL = 8mA (Note 4)
VDD = 1.85V, IOL = 4.5mA
IOH = -2mA, VDD = 1.85V
Input/Output Pin Capacitance
for All Port Pins
CIO (Note 4)
Input Leakage Current
IL
Input Pullup Resistor for
RESET, IRTX, IRRX, P0, P1, P2
RPU
EXTERNAL CRYSTAL/RESONATOR
Internal pullup disabled
VDD = 3.0V, VOL = 0.4V (Note 4)
VDD = 2.0V, VOL = 0.4V
Crystal/Resonator
Crystal/Resonator Period
Crystal/Resonator Warmup
Time
fHFXIN
tHFXIN
http://www.DataSheet4U.net/
tXTAL_RDY From initial oscillation
Oscillator Feedback Resistor
EXTERNAL CLOCK INPUT
ROSCF (Note 4)
External Clock Frequency
External Clock Period
fXCLK
tXCLK
MIN
VDD - 0.5
-100
16
17
1
0.5
DC
System Clock Frequency
System Clock Period
NANOPOWER RING
Nanopower Ring Frequency
Nanopower Ring Current
FLASH MEMORY (Note 10)
System Clock During Flash
Programming/Erase
Flash Erase Time
fCK HFXOUT = GND
tCK
fNANO
INANO
TA = +25NC
TA = +25NC, VDD = POR voltage
(Note 4)
Typical at VDD = 1.64V,
TA = +25°C (Note 4)
fFPSYSCLK
tME
tERASE
Mass erase
Page erase
3.0
1.7
6
20
20
TYP
0.4
0.4
0.4
10
28
30
1/fHFXIN
8192 x
tHFXIN
1.0
1/fXCLK
fHFXIN
fXCLK
1/fCK
8.0
2.4
40
MAX
1.0
1.0
1.0
0.5
0.5
0.5
VDD
+100
39
41
UNITS
V
V
V
pF
nA
kW
12 MHz
ns
ms
1.5 MW
12 MHz
ns
MHz
ns
20.0
kHz
400 nA
MHz
40
40
ms
Maxim Integrated
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
MAXQ614
16-Bit Microcontroller with Infrared Module
IR Carrier Generation and
Modulation Timer
The dedicated IR timer/counter module simplifies low-
speed infrared (IR) communication. The IR timer imple-
ments two pins (IRTX and IRRX) for supporting IR trans-
mit and receive, respectively. The IRTX pin has no corre-
sponding port pin designation, so the standard PD, PO,
and PI port control status bits are not present. However,
the IRTX pin output can be manipulated high or low using
the PWCN.IRTXOUT and PWCN.IRTXOE bits when the IR
timer is not enabled (i.e., IREN = 0).
The IR timer is composed of a carrier generator and a
carrier modulator. The carrier generation module uses
the 16-bit IR carrier register (IRCA) to define the high
and low time of the carrier through the IR carrier high
byte (IRCAH) and IR carrier low byte (IRCAL). The carrier
modulator uses the IR data bit (IRDATA) and IR modula-
tor time register (IRMT) to determine whether the carrier
or the idle condition is present on IRTX.
The IR timer is enabled when the IR enable bit (IREN) is
set to 1. The IR Value register (IRV) defines the begin-
ning value for the carrier modulator. During transmission,
the IRV register is initially loaded with the IRMT value
and begins down counting towards 0000h, whereas in
receive mode it counts upward from the initial IRV regis-
ter value. During the receive operation, the IRV register
can be configured to reload with 0000h when capture
occurs on detection of selected edges or can be allowed
to continue free-running throughout the receive opera-
tion. An overflow occurs when the IR timer value rolls over
from 0FFFFh to 0000h. The IR overflow flag (IROV) is set
to 1 and an interrupt is generated if enabled (IRIE = 1).
Carrier Generation Module
The IRCAH byte defines the carrier high time in terms of
the number of IR input clocks, whereas the IRCAL byte
defines the carrier low time.
• IR Input Clock (fIRCLK) = fSYS/2IRDIV[1:0]
• Carrier Frequency (fCARRIER) = fIRCLK/(IRCAH + IRCAL + 2)
• Carrier High Time = IRCAH + 1
• Carrier Low Time = IRCAL + 1
• Carrier Duty Cycle = (IRCAH + 1)/(IRCAH + IRCAL + 2)
During transmission, the IRCA register is latched for each
IRV down-count interval, and is sampled along with the
IRTXPOL and IRDATA bits at the beginning of each new
IRV down-count interval so that duty-cycle variation and
Maxim Integrated
frequency shifting is possible from one interval to the
next, which is illustrated in Figure 1.
Figure 2 illustrates the basic carrier generation and its
path to the IRTX output pin. The IR transmit polarity bit
(IRTXPOL) defines the starting/idle state and the carrier
polarity of the IRTX pin when the IR timer is enabled.
IR Transmission
During IR transmission (IRMODE = 1), the carrier genera-
tor creates the appropriate carrier waveform, while the
carrier modulator performs the modulation. The carrier
modulation can be performed as a function of carrier
cycles or IRCLK cycles dependent on the setting of the
IRCFME bit. When IRCFME = 0, the IRV down counter is
clocked by the carrier frequency and thus the modula-
tion is a function of carrier cycles. When IRCFME = 1, the
IRV down counter is clocked by IRCLK, allowing carrier
modulation timing with IRCLK resolution.
The IRTXPOL bit defines the starting/idle state as well as
the carrier polarity for the IRTX pin. If IRTXPOL = 1, the
IRTX pin is set to a logic-high when the IR timer module is
enabled. If IRTXPOL = 0, the IRTX pin is set to a logic-low
when the IR timer is enabled.http://www.DataSheet4U.net/
A separate register bit, IR data (IRDATA), is used to determine
whether the carrier generator output is output to the IRTX pin
for the next IRMT carrier cycles. When IRDATA = 1, the car-
rier waveform (or inversion of this waveform if IRTXPOL = 1)
is output on the IRTX pin during the next IRMT cycles. When
IRDATA = 0, the idle condition, as defined by IRTXPOL, is
output on the IRTX pin during the next IRMT cycles.
The IR timer acts as a down counter in transmit mode.
An IR transmission starts when the IREN bit is set to 1
when IRMODE = 1; when the IRMODE bit is set to 1 when
IREN = 1; or when IREN and IRMODE are both set to 1 in
the same instruction. The IRMT and IRCA registers, along
with the IRDATA and IRTXPOL bits, are sampled at the
beginning of the transmit process and every time the IR
timer value reload its value. When the IRV reaches 0000h
value, on the next carrier clock, it does the following:
1) Reloads IRV with IRMT.
2) Samples IRCA, IRDATA, and IRTXPOL.
3) Generates IRTX accordingly.
4) Sets IRIF to 1.
5) Generates an interrupt to the CPU if enabled (IRIE = 1).
To terminate the current transmission, the user can
switch to receive mode (IRMODE = 0) or clear IREN to 0.
Carrier Modulation Time = IRMT + 1 carrier cycles
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet MAXQ614.PDF ] | |
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