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参数资料
| 型号： | MAXQ2000-RFX+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/39页 |
| 文件大小： | 0K |
| 描述： | IC MCU 32K FLASH 100-LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | MAXQ® |
| 核心处理器： | RISC |
| 芯体尺寸： | 16-位 |
| 速度： | 20MHz |
| 连通性： | 1 线，SPI，UART/USART |
| 外围设备： | LCD，POR，PWM，WDT |
| 输入/输出数： | 50 |
| 程序存储器容量： | 64KB（32K x 16） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 2K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.8 V ~ 2.75 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 100-LQFP |
| 包装： | 托盘 |
| 产品目录页面： | 703 (CN2011-ZH PDF) |
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MAXQ2000
Low-Power LCD Microcontroller
____________________________________________________________________
27
Power Management
Advanced power-management features minimize
power consumption by dynamically matching the pro-
cessing speed of the device to the required perfor-
mance level. This means device operation can be
slowed and power consumption minimized during peri-
ods of reduced activity. When more processing power
is required, the microcontroller can increase its operat-
ing frequency. Software-selectable clock-divide opera-
tions allow flexibility, selecting whether a system clock
cycle is 1, 2, 4, or 8 oscillator cycles. By performing this
function in software, a lower power state can be
entered without the cost of additional hardware.
For extremely power-sensitive applications, three addi-
tional low-power modes are available:
PMM1: divide-by-256 power-management mode
(PMME = 1, CD1:0 = 00b)
PMM2: 32kHz power-management mode (PMME = 1,
CD1:0 = 11b)
Stop mode (STOP = 1)
In PMM1, one system clock is 256 oscillator cycles, sig-
nificantly reducing power consumption while the micro-
controller functions at reduced speed. In PMM2, the
device can run even slower by using the 32kHz oscilla-
tor as the clock source. The optional switchback fea-
ture allows enabled interrupt sources including external
interrupts, UARTs, and the SPI module to quickly exit
the power-management modes and return to a faster
internal clock rate.
Power consumption reaches its minimum in Stop mode.
In this mode, the external oscillator, system clock, and all
processing activity is halted. Stop mode is exited when
an enabled external interrupt pin is triggered, an external
reset signal is applied to the RESET pin, or the RTC time-
of-day alarm is activated. Upon exiting Stop mode, the
microcontroller can choose to wait for the external high-
frequency crystal to complete its warmup period, or it
can start execution immediately from its internal ring
oscillator while the warmup period completes.
Interrupts
Multiple interrupt sources are available for quick
response to internal and external events. The MAXQ
architecture uses a single interrupt vector (IV), single
interrupt-service routine (ISR) design. For maximum
flexibility, interrupts can be enabled globally, individual-
ly, or by module. When an interrupt condition occurs,
its individual flag is set, even if the interrupt source is
disabled at the local, module, or global level. Interrupt
flags must be cleared within the user-interrupt routine
to avoid repeated interrupts from the same source.
Application software must ensure a delay between the
write to the flag and the RETI instruction to allow time
for the interrupt hardware to remove the internal inter-
rupt condition. Asynchronous interrupt flags require a
one-instruction delay and synchronous interrupt flags
require a two-instruction delay.
When an enabled interrupt is detected, software jumps
to a user-programmable interrupt vector location. The
IV register defaults to 0000h on reset or power-up, so if
it is not changed to a different address, the user pro-
gram must determine whether a jump to 0000h came
from a reset or interrupt source.
Once software control has been transferred to the ISR,
the interrupt identification register (IIR) can be used to
determine if a system register or peripheral register
was the source of the interrupt. The specified module
can then be interrogated for the specific interrupt
source and software can take appropriate action.
Because the interrupts are evaluated by user software,
the user can define a unique interrupt priority scheme
for each application. The following interrupt sources are
available. Sources marked with an asterisk are not
available on the 56-pin version.
Watchdog Interrupt
External Interrupts 0 to 15 (INT10*, INT11*)
RTC Time-of-Day and Subsecond Alarms
Serial Port 0 Receive and Transmit Interrupts
Serial Port 1 Receive and Transmit Interrupts*
SPI Mode Fault, Write Collision, Receive Overrun, and
Transfer Complete Interrupts
Timer 0 Low Compare, Low Overflow,
Capture/Compare, and Overflow Interrupts
Timer 1 Low Compare, Low Overflow,
Capture/Compare, and Overflow Interrupts
Timer 2 Low Compare, Low Overflow,
Capture/Compare, and Overflow Interrupts
1-Wire Presence Detect, Transmit Buffer Empty,
Transmit Shift Register Empty, Receive Buffer Full,
and Shift Register Full, Short, and Low Interrupts*
Reset Sources
Several reset sources are provided for microcontroller
control. Although code execution is halted in the reset
state, the high-frequency oscillator and the ring oscillator
continue to oscillate. Internal resets such as the power-
on and watchdog resets assert the RESET pin low.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAXQ2000-RFX+ | 功能描述:16位微控制器 - MCU Low-Power LCD MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| MAXQ-2000STK | 功能描述:开发板和工具包 - 其他处理器 STARTERKIT BRD FOR MAX2000-RAX RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MAXQ2010 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:16-Bit Mixed-Signal Microcontroller with LCD Interface |
| MAXQ2010_11 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit |
| MAXQ2010-KIT | 功能描述:开发板和工具包 - 其他处理器 RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
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