参数资料
| 型号： | AT91M42800A-33AI |
| 厂商： | Atmel |
| 文件页数： | 27/27页 |
| 文件大小： | 0K |
| 描述： | IC ARM7 MCU 144 TQFP |
| 标准包装： | 60 |
| 系列： | AT91 |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 33MHz |
| 连通性： | EBI/EMI，SPI，UART/USART |
| 外围设备： | WDT |
| 输入/输出数： | 54 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 8K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 144-LQFP |
| 包装： | 托盘 |
| 配用： | AT91EB42-ND - KIT EVAL FOR ARM AT91M42800A |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页
9
1779ES–ATARM–14-Apr-06
AT91M42800A
5.
Architectural Overview
The AT91M42800A microcontroller integrates an ARM7TDMI with its embedded ICE interface,
memories and peripherals. Its architecture consists of two main buses, the Advanced System
Bus (ASB) and the Advanced Peripheral Bus (APB). Designed for maximum performance and
controlled by the memory controller, the ASB interfaces the ARM7TDMI processor with the on-
chip 32-bit memories, the External Bus Interface (EBI) and the AMBA Bridge. The AMBA
Bridge drives the APB, which is designed for accesses to on-chip peripherals and optimized for
low power consumption.
The AT91M42800A microcontroller implements the ICE port of the ARM7TDMI processor on
dedicated pins, offering a complete, low-cost and easy-to-use debug solution for target
debugging.
5.1
Memories
The AT91M42800A microcontroller embeds up to 8K bytes of internal SRAM. The internal mem-
ory is directly connected to the 32-bit data bus and is single-cycle accessible. This provides
maximum performance of 30 MIPS at 33 MHz by using the ARM instruction set of the processor.
The on-chip memory significantly reduces the system power consumption and improves its per-
formance over external memory solutions.
The AT91M42800A microcontroller features an External Bus Interface (EBI), which enables con-
nection of external memories and application-specific peripherals. The EBI supports 8- or 16-bit
devices and can use two 8-bit devices to emulate a single 16-bit device. The EBI implements the
early read protocol, enabling faster single clock cycle accesses two times faster than standard
memory interfaces.
5.2
Peripherals
The AT91M42800A microcontroller integrates several peripherals, which are classified as sys-
tem or user peripherals. All on-chip peripherals are 32-bit accessible by the AMBA Bridge, and
can be programmed with a minimum number of instructions. The peripheral register set is com-
posed of control, mode, data, status and enable/disable/status registers.
An on-chip Peripheral Data Controller (PDC) transfers data between the on-chip USARTs/SPIs
and the on- and off-chip memories without processor intervention. Most importantly, the PDC
removes the processor interrupt handling overhead and significantly reduces the number of
clock cycles required for a data transfer. It can transfer up to 64K continuous bytes without
reprogramming the start address. As a result, the performance of the microcontroller is
increased and the power consumption reduced.
5.2.1
System Peripherals
The External Bus Interface (EBI) controls the external memory and peripheral devices via an 8-
or 16-bit data bus and is programmed through the APB. Each chip select line has its own pro-
gramming register.
The Power Management Controller (PMC) optimizes power consumption of the product by con-
trolling the clocking elements such as the oscillator and the two PLLs, system and user
peripheral clocks.
The Advanced Interrupt Controller (AIC) controls the internal sources from the internal peripher-
als and the five external interrupt lines (including the FIQ) to provide an interrupt and/or fast
相关PDF资料 |
PDF描述 |
|---|---|
| 17FMN-BMT-A-TF | CONN FMN HSNG 17POS SNGL NOR SMD |
| AT91R40008-66AI | IC ARM7 MCU 176 TQFP |
| 12FMN-BMT-A-TF | CONN FMN HSNG 12POS SNGL NOR SMD |
| PIC24FJ48GA004-E/PT | IC PIC MCU FLASH 48K 44-TQFP |
| PIC18LF26J13-I/SP | IC PIC MCU 64KB FLASH 28SPDIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91M42800A-33AI SL383 | 功能描述:IC ARM MCU 16BIT 144TQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:AT91 标准包装:1,500 系列:AVR® ATtiny 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C，LIN，SPI，UART/USART，USI 外围设备:欠压检测/复位，POR，PWM，温度传感器，WDT 输入/输出数:16 程序存储器容量:8KB（4K x 16） 程序存储器类型:闪存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 11x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 包装:带卷 (TR) |
| AT91M42800A-33AI-T | 功能描述:IC MCU 32BIT ROMLESS 144LQFP 制造商:microchip technology 系列:AT91 包装:带卷（TR） 零件状态:停產 核心处理器:ARM7? 核心尺寸:16/32-位 速度:33MHz 连接性:EBI/EMI，SPI，UART/USART 外设:WDT I/O 数:54 程序存储容量:- 程序存储器类型:ROMless EEPROM 容量:- RAM 容量:8K x 8 电压 - 电源（Vcc/Vdd）:2.7 V ~ 3.6 V 数据转换器:- 振荡器类型:外部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:144-LQFP 供应商器件封装:144-LQFP（20x20） 基本零件编号:AT91M42800 标准包装:1,000 |
| AT91M42800A-33AU | 功能描述:ARM微控制器 - MCU 8kB SRAM 33MHz - PWM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| 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 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| AT91M42800A-33CI | 功能描述:IC ARM7 MCU 144 BGA RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:AT91 标准包装:9 系列:87C 核心处理器:8051 芯体尺寸:8-位 速度:40/20MHz 连通性:UART/USART 外围设备:POR，WDT 输入/输出数:32 程序存储器容量:32KB（32K x 8） 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:0°C ~ 70°C 封装/外壳:40-DIP（0.600"，15.24mm） 包装:管件 |
发布紧急采购，3分钟左右您将得到回复。