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| 型号： | MAX31782ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC MICROCONTROLLER 40TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 3,000 |
| 系列： | MAXQ® |
| 应用： | 系统管理 |
| 核心处理器： | MAXQ20 |
| 程序存储器类型： | 闪存（64 kB），ROM（8 kB） |
| RAM 容量： | 1K x 16 |
| 接口： | I²C，SM 总线 |
| 输入/输出数： | 5 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 其它名称： | 90-31782+TTR |
MAX31782
System Management Microcontroller
12
Password
The device is programmed with a default password
prior to being shipped. The password is defined as the
16 words of physical program memory at addresses
0010h–001Fh. A single password lock bit (PWL) is
implemented in the SC register. Once a new device is
programmed, a password is defined (password is other
than all zeros or all ones) and the PWL bit is set. If the
PWL is zero, the device is deemed unprogrammed. The
password is automatically set to all ones following a
mass erase.
Stack Memory
A 16-bit, 16-level internal stack provides storage for
program return addresses and general-purpose use.
The stack is used automatically by the processor when
the CALL, RET, and RETI instructions are executed and
interrupts serviced. The stack can also be used explicitly
to store and retrieve data by using the PUSH, POP, and
POPI instructions.
On reset, the stack pointer, SP, initializes to the top of the
stack (0Fh). The CALL, PUSH, and interrupt-vectoring
operations increment SP, and then store a value at the
location pointed to by SP. The RET, RETI, POP, and POPI
operations retrieve the value at SP and then decrement SP.
Programming
The flash memory of the microcontroller can be pro-
grammed by one of three methods: in-system pro-
gramming, in-application programming, and production
programming. All three methods provide great flexibility
in system design and reduce the life-cycle cost of the
embedded system.
In-System Programming
An internal bootstrap loader allows the device to be pro-
grammed over the JTAG or I2C-compatible interfaces.
As a result, system software can be upgraded in-system,
eliminating the need for a costly hardware retrofit when
software updates are required.
Programming source select (PSS) bits in the ICDF
register determine which interface is used for bootload-
ing operation. The device supports JTAG and I2C as
an interface corresponding to 00 and 01 bits of PSS,
respectively.
In-Application Programming
The in-application programming feature allows the
microcontroller to modify its own flash program memory.
This allows on-the-fly software updates in mission-critical
applications that cannot afford downtime. Alternatively, it
allows the application to develop custom loader software
that can operate under the control of the application soft-
ware. The utility ROM contains firmware-accessible flash
programming functions that erase and program flash
memory. These functions are described in detail in the
MAX31782 User’s Guide.
System Timing
The device generates its 4MHz instruction clock (MOSC)
internally using a ring oscillator. On power-up, the output
of the oscillator (which cannot be accessed externally) is
disabled until VDD rises above VBO. Once this threshold
is reached, 1000 cycles are counted (~ 250Fs) and then
the output is enabled, clocking the device.
System Reset
The device features several sources that can be used to
reset the device.
Power-On Reset
An internal power-on-reset (POR) circuit is used to
enhance system reliability. This circuit forces the device
to perform a POR whenever a rising voltage on VDD
climbs above VPOR. When this happens the following
events occur:
Allregistersandcircuitsentertheirresetstate
ThePORflag(WDCN.7)issettoindicatethesource
of the reset
Code execution begins at location 8000h when the
reset condition is released
Brownout Detect/Reset
The device features a brownout-detect/reset function.
Whenever the power monitor detects a brownout condi-
tion (when VDD < VBO), it immediately issues a reset
and stays in that state as long as VDD remains below
VBO. Once VDD voltage rises above VBO, the device
waits for tSU:MOSC before returning to normal opera-
tion, also referred to as CPU state. If a brownout occurs
during tSU:MOSC, it again goes back to the brownout
state. Otherwise, it enters into CPU state. In CPU state,
the brownout detector is also enabled. On power-up,
the device always enters into brownout state first and
then follows the previously mentioned sequence. The
reset issued by brownout is the same as POR. Whatever
action happens on POR also happens on brownout
reset. All the registers that are cleared on POR are also
cleared on brownout reset.
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相关代理商/技术参数 |
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|---|---|
| MAX31782EVKIT# | 功能描述:开发板和工具包 - 其他处理器 MAX31782 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: |
| MAX31783ETM+ | 功能描述:8位微控制器 -MCU System Management 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 |
| MAX31783ETM+T | 功能描述:8位微控制器 -MCU System Management 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 |
| MAX31785ETL+ | 功能描述:马达/运动/点火控制器和驱动器 6Ch Intelligent Fan Controller RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| MAX31785ETL+T | 功能描述:马达/运动/点火控制器和驱动器 6Ch Intelligent Fan Controller RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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