参数资料
| 型号： | AT91M42800A-33CI SL383 |
| 厂商： | Atmel |
| 文件页数： | 7/27页 |
| 文件大小： | 0K |
| 描述： | IC ARM MCU 16BIT 144BGA |
| 标准包装： | 1,000 |
| 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： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 144-LFBGA |
| 包装： | 带卷 (TR) |
| 配用： | AT91EB42-ND - KIT EVAL FOR ARM AT91M42800A |
| 其它名称： | AT91M42800A33CISL |
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15
1779ES–ATARM–14-Apr-06
AT91M42800A
The pin BMS is multiplexed with the I/O line PA27 that can be programmed after reset like any
standard PIO line.
7.7.4
Remap Command
The ARM vectors (Reset, Abort, Data Abort, Prefetch Abort, Undefined Instruction, Interrupt,
Fast Interrupt) are mapped from address 0x0 to address 0x20. In order to allow these vectors to
be redefined dynamically by the software, the AT91M42800A microcontroller uses a remap
command that enables switching between the boot memory and the internal SRAM bank
addresses. The remap command is accessible through the EBI User Interface, by writing one in
RCB of EBI_RCR (Remap Control Register). Performing a remap command is mandatory if
access to the other external devices (connected to chip selects 1 to 7) is required. The remap
operation can only be changed back by an internal reset or an NRST assertion.
7.7.5
Abort Control
The abort signal providing a Data Abort or a Prefetch Abort exception to the ARM7TDMI is
asserted in the following cases:
When accessing an undefined address in the EBI address space
When the ARM7TDMI performs a misaligned access
No abort is generated when reading the internal memory or by accessing the internal peripher-
als, whether the address is defined or not.
When the processor performs a forbidden write access in a mode-protected peripheral register,
the write is cancelled but no abort is generated.
The processor can perform word or half-word data access with a misaligned address when a
register relative load/store instruction is executed and the register contains a misaligned
address. In this case, whether the access is in write or in read, an abort is generated but the
access is not cancelled.
The Abort Status Register traces the source that caused the last abort. The address and the
type of abort are stored in registers of the External Bus Interface.
7.7.6
External Bus Interface
The External Bus Interface handles the accesses between addresses 0x0040 0000 and 0xFFC0
0000. It generates the signals that control access to the external devices, and can be configured
from eight 1-Mbyte banks up to four 16-Mbyte banks. In all cases it supports byte, half-word and
word aligned accesses.
For each of these banks, the user can program:
Number of wait states
Number of data float times (wait time after the access is finished to prevent any bus
contention in case the device takes too long in releasing the bus)
Data bus width (8-bit or 16-bit)
Table 7-1.
Boot Mode Select
BMS
Boot Memory
1
External 8-bit memory NCS0
0
External 16-bit memory on NCS0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91M42800A-33CI-T | 功能描述:IC MCU 32BIT ROMLESS 144BGA 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-LFBGA 供应商器件封装:144-BGA（13x13） 基本零件编号:AT91M42800 标准包装: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 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-33CJ-999 | 功能描述:ARM微控制器 - MCU BGA Ind. Temp 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 |
| AT91M43300 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers |
| AT91M43300-12CC-1.8 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers |
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