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参数资料
| 型号： | MAXQ1004-B01+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | RISC MICROCONTROLLER, QCC16 |
| 封装： | 4 X 4 MM, ROHS COMPLIANT, TQFN-16 |
| 文件页数： | 3/18页 |
| 文件大小： | 1247K |
| 代理商： | MAXQ1004-B01+ |
MAXQ1004
1-Wire and SPI Authentication Microcontroller
11
Loading Flash Memory with
the Bootstrap Loader
An internal bootstrap loader allows the device to be
reloaded over a simple JTAG interface. As a result, soft-
ware can be upgraded in-system, eliminating the need
for a costly hardware retrofit when updates are required.
Remote software uploads are possible that enable
physically inaccessible applications to be frequently
updated. If in-system programmability is not required,
a commercial gang programmer can be used for mass
programming.
In-Application Flash Programming
From user-application code, internal flash memory can
be programmed/erased by calling internal ROM utility
functions from either C or assembly language. Memory
protection is enforced by the ROM utility functions. The
function declarations below show examples of some of
the ROM utility functions provided for in-application flash
memory programming.
/* Write one 16-bit word to code address ‘dest’.
* Dest must be aligned to 16 bits.
* Returns 0 = failure, 1 = OK.
*/
int flash_write16(uint16_t dest, uint16_t data);
To erase, the following function would be used:
/* Erase the given Flash page
* addr: Flash offset (anywhere within page)
*/
int flash_erasepage(uint16_t addr);
Code Scrambling
Automated code scrambling protects user-code mem-
ory against attempts to determine the code contents.
The proprietary scrambling algorithm is transparent to
the user and still allows in-application programming.
Address shuffling prevents well-known startup code from
always being at the known location 0000h and interrupt
vector code at known locations. This obfuscates confi-
dential software and makes the application secure from
hackers and copiers.
ADC
The 10-bit delta-sigma analog-to-digital converter (ADC)
allows the application to measure external voltages,
most commonly the voltage of the batteries driving VDD.
The analog input, AN0, can be optionally scaled by 50%
for direct supply voltage measurement. The ADC value
saturates (all data bits read 1) when the input voltage
exceeds the maximum allowable ADC reference voltage.
The internal temperature sensor is measured by the ADC
when selected.
Each conversion can choose its own reference from
AVDD or the internal reference. Data can be retrieved
in either left-justified or right-justified format, giving the
application direct control on data format.
A conversion takes 1025 ADCCLK cycles to com-
plete. The ADCCLK is derived from the system clock
with divide ratio defined by the ADC clock-divider bits
(ADCCLK). Therefore, with 1025 ADCCLK to acquire
one data, the fastest ADC rate = Sysclk/1025 (ADCCLK
= 0h). See Figure 1.
Temperature Sensor
An integrated temperature sensor measures the internal
temperature of the device with an error of Q6NC. The tem-
perature sensor is connected to channel 1 of the ADC.
To read the temperature sensor, select ADCH to 1.
Nanopower Ring Wake-Up Timer
A nanopower-ring oscillator can be used to drive a
wake-up timer that causes the device to exit stop mode
after a user-selectable time period. The wake-up timer is
software programmable in 16-bit steps of the nanopower
ring clock up to approximately 8 seconds.
Serial Number/Device ID
Each device has a factory-programmed, unique, 64-bit
device identification number (ID). This ID ensures device
traceability and serves as an input to the device’s
authentication protocol.
The first 8 bits of the device ID are a 1-Wire family code
that is the same for all MAXQ1004 devices. The next 48
bits are a factory-programmed unique serial number.
Even if multiple devices are used in a 1-Wire network, the
unique, 48-bit serialization field prevents any address
conflict, allowing communication with each device indi-
vidually. The last 8 bits are a factory-programmed cyclic
redundancy check (CRC) of the first 56 bits. The 1-Wire
CRC is generated using a polynomial generator consist-
ing of a shift register and XOR gates. The polynomial is
x8 + x5 + x4 + 1.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAXQ1004-B01+ | 功能描述:16位微控制器 - MCU 1-Wire and SPI Authentication 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 |
| MAXQ1004-KIT# | 功能描述:开发板和工具包 - 其他处理器 MAXQ1004 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: |
| MAXQ1010 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Security Token Microcontroller with RTC and USB |
| MAXQ1010-A01+ | 制造商:Maxim Integrated Products 功能描述:MAXQ1010 PSWD GEN MICRO 48 TQFN - Rail/Tube |
| MAXQ1010-DNS+ | 制造商:Maxim Integrated Products 功能描述:MAXQ1010 PSWD GEN MICRO DIE WAFFLE - Gel-pak, waffle pack, wafer, diced wafer on film |
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