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參數(shù)資料
| 型號： | AT91M42800A-33AU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 9/27頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ARM7 MCU 144 LQFP |
| 產(chǎn)品培訓(xùn)模塊： | SAM9 MPU Boot Solutions & Application Deployment MCU Product Line Introduction |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 系列： | AT91 |
| 核心處理器： | ARM7 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 33MHz |
| 連通性： | EBI/EMI，SPI，UART/USART |
| 外圍設(shè)備： | WDT |
| 輸入/輸出數(shù)： | 54 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 8K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 144-LQFP |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 610 (CN2011-ZH PDF) |
| 配用： | AT91EB42-ND - KIT EVAL FOR ARM AT91M42800A |
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1779ES–ATARM–14-Apr-06
AT91M42800A
8.3
Peripheral Data Controller
The AT91M42800A has an 8-channel PDC dedicated to the two on-chip USARTs and to the two
on-chip SPIs. One PDC channel is connected to the receiving channel and one to the transmit-
ting channel of each peripheral.
The user interface of a PDC channel is integrated in the memory space of each USART channel
and in the memory space of each SPI. It contains a 32-bit address pointer register and a 16-bit
count register. When the programmed data is transferred, an end-of-transfer interrupt is gener-
ated by the corresponding peripheral. See the USART section and the SPI sections for more
details on PDC operation and programming.
8.4
System Peripherals
8.4.1
PMC: Power Management Controller
The AT91M42800A’s Power Management Controller optimizes the power consumption of the
device. The PMC controls the clocking elements such as the oscillator and the PLLs, and the
System and the Peripheral Clocks. It also controls the MCKO pin and permits to the user to
select four different signals to be driven on this pin.
The AT91M42800A has the following clock elements:
The oscillator providing a clock that depends on the crystal fundamental frequency
connected between the XIN and XOUT pins
PLL A providing a low-to-middle frequency clock range
PLL B providing a middle-to-high frequency range
The Clock prescaler
The ARM Processor Clock controller
The Peripheral Clock controller
The Master Clock Output controller
The on-chip low-power oscillator together with the PLL-based frequency multiplier and the pres-
caler results in a programmable clock between 500 Hz and 66 MHz. It is the responsibility of the
user to make sure that the PMC programming does not result in a clock over the acceptable
limits.
8.4.2
ST: System Timer
The System Timer module integrates three different free-running timers:
A Period Interval Timer setting the base time for an Operating System.
A Watchdog Timer that is built around a 16-bit counter, and is used to prevent system lock-up
if the software becomes trapped in a deadlock. It can generate an internal reset or interrupt,
or assert an active level on the dedicated pin NWDOVF.
A Real-time Timer counting elapsed seconds.
These timers count using the Slow Clock provided by the MCU. Typically, this clock has a fre-
quency of 32768 Hz.
8.4.3
AIC: Advanced Interrupt Controller
The AT91M42800A has an 8-level priority, individually maskable, vectored interrupt controller.
This feature substantially reduces the software and real-time overhead in handling internal and
external interrupts.
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| AT91M42800A-33AU-999 | 功能描述:ARM微控制器 - MCU Ind. Temp Green RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| AT91M42800A-33CI | 功能描述:IC ARM7 MCU 144 BGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:AT91 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR，WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB（32K x 8） 程序存儲器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP（0.600"，15.24mm） 包裝:管件 |
| AT91M42800A-33CI SL383 | 功能描述:IC ARM MCU 16BIT 144BGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:AT91 標(biāo)準(zhǔn)包裝:1,500 系列:AVR® ATtiny 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C，LIN，SPI，UART/USART，USI 外圍設(shè)備:欠壓檢測/復(fù)位，POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):16 程序存儲器容量:8KB（4K x 16） 程序存儲器類型:閃存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 11x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:帶卷 (TR) |
| AT91M42800A-33CI-T | 功能描述:IC MCU 32BIT ROMLESS 144BGA 制造商:microchip technology 系列:AT91 包裝:帶卷（TR） 零件狀態(tài):停產(chǎn) 核心處理器:ARM7? 核心尺寸:16/32-位 速度:33MHz 連接性:EBI/EMI，SPI，UART/USART 外設(shè):WDT I/O 數(shù):54 程序存儲容量:- 程序存儲器類型:ROMless EEPROM 容量:- RAM 容量:8K x 8 電壓 - 電源（Vcc/Vdd）:2.7 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器類型:外部 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:144-LFBGA 供應(yīng)商器件封裝:144-BGA（13x13） 基本零件編號:AT91M42800 標(biāo)準(zhǔn)包裝:1,000 |
| AT91M42800A-33CJ | 功能描述:ARM微控制器 - MCU BGA IND TEMP RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
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