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参数资料
| 型号： | MAXQ2010-RFX+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 10 MHz, RISC MICROCONTROLLER, PQFP100 |
| 封装： | ROHS COMPLIANT, LQFP-100 |
| 文件页数： | 17/34页 |
| 文件大小： | 442K |
| 代理商： | MAXQ2010-RFX+ |
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MAXQ2010
16-Bit Mixed-Signal Microcontroller
with LCD Interface
24
______________________________________________________________________________________
clock source. The device contains an FLL that is used
as a clock source by itself (FLLEN = 0) or as a multipli-
er for the 32kHz crystal (FLLEN = 1). The 32kHz-mode-
based timing is more stable due to the use of the
crystal as a time base.
A crystal warmup counter enhances operational reliabil-
ity. If the user has selected to run from the external
crystal or clock source, each time the external crystal
oscillation must restart, such as after exiting stop mode,
the device initiates a crystal warmup period of 65,536
oscillations. This allows time for the crystal amplitude
and frequency to stabilize before using it as a clock
source. While in the warmup mode, the device operates
from the internal FLL and automatically switches back
to the crystal as soon as it is ready.
Programmable clock-divide control bits (CD1 and CD0)
and the PMME bit provide the processor with the ability
to slow the system clock, resulting in lower power con-
sumption. The CD[1:0] bits default to 00b, selecting a
divide-by-1 system clock, but five clock-divisor options
allow the selection of different crystals to accommodate
specific system needs. In power-management mode
(PMM), one system clock is 256 oscillator cycles, signif-
icantly reducing power consumption while the micro-
controller functions at reduced speed. The switchback
feature allows the system to exit PMM in response to an
external interrupt or serial port activity, quickly switch-
ing from the slower, power-saving mode to full speed.
In addition, the lowest power stop mode allows the
microcontroller to stop the internal oscillator, halting the
system clock.
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 flex-
ibility, interrupts can be enabled globally, individually, or
by the module. When an interrupt condition occurs, its
individual flag is set, even if the interrupt source is dis-
abled 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 user
software evaluates the interrupts, the user can define a
unique interrupt priority scheme for each application.
The following interrupt sources are supported:
Supply Voltage Monitor
External Interrupts 22 to 0
Timer 2, 1, 0
Serial Port 1, 0
Watchdog Timer
RTC Time-of-Day or Subsecond Alarm
SPI
I2C
ADC
When an enabled interrupt is detected, software jumps
to the dedicated interrupt vector address reserved for
that interrupt. User-application code at this address
then routes program execution to a user-defined inter-
rupt routine.
I/O Ports
The microcontroller uses Type C and Type D bidirec-
tional I/O pins as described in the
MAXQ Family User's
Guide. Each port has up to eight independent, general-
purpose I/O pins and three configure/control registers.
Many pins support alternate functions such as timers or
interrupts, which are enabled, controlled, and monitored
by dedicated peripheral registers. Using the alternate
function automatically converts the pin to that function,
overriding the general-purpose I/O functionality.
Type C port pins have Schmitt trigger receivers and full
CMOS output drivers, and can support alternate func-
tions. The pin is either high impedance or a weak
pullup when defined as an input, dependent on the
state of the corresponding bit in the output register.
Type D port pins have Schmitt trigger receivers and full
CMOS output drivers, and can support alternate func-
tions. The pin is either high impedance or a weak
pullup when defined as an input, dependent on the
state of the corresponding bit in the output register. All
Type D pins also have interrupt capability. See Figure 6
for a Type C/D port pin schematic.
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相关代理商/技术参数 |
参数描述 |
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| MAXQ2010-RFX+ | 功能描述:16位微控制器 - MCU 16-Bit Mixed-Signal MCU w/LCD Interface 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 |
| MAXQ2KUSB-KIT# | 功能描述:开发板和工具包 - 其他处理器 MAXQ2000 Eval Kit 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: |
| MAXQ305 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Voltage Microcontroller with Infrared Module |
| MAXQ305J-0000+ | 功能描述:8位微控制器 -MCU MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| MAXQ305X-0000+ | 功能描述:8位微控制器 -MCU MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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