參數(shù)資料
型號(hào)： AT91M42800A-33CJ-999
廠商： Atmel
文件頁(yè)數(shù)： 7/27頁(yè)
文件大?。?/td> 0K
描述： IC MCU 32BIT RISC 144BGA
標(biāo)準(zhǔn)包裝： 1
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： POR，WDT
輸入/輸出數(shù)： 54
程序存儲(chǔ)器類(lèi)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-LFBGA
包裝： 剪切帶 (CT)
其它名稱(chēng)： AT91M42800A-33CJ-999CT
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
相關(guān)PDF資料
PDF描述
VI-BTJ-IW-F2 CONVERTER MOD DC/DC 36V 100W
VI-BTH-IX-F3 CONVERTER MOD DC/DC 52V 75W
MAX1840EUB+ IC TRANS LEVEL SIM 10-UMAX
VI-BTH-IX-F2 CONVERTER MOD DC/DC 52V 75W
DS8023-RJX+ IC INTERFACE SMART CARD 28-TSSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT91M43300 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:ARM Thumb Microcontrollers
AT91M43300-12CC-1.8 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:ARM Thumb Microcontrollers
AT91M43300-12CI-1.8 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:ARM Thumb Microcontrollers
AT91M43300-25CC 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:ARM Thumb Microcontrollers
AT91M43300-25CI 功能描述:IC ARM7 MCU 144 BGA RoHS:否 類(lèi)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(chǔ)器容量:32KB（32K x 8） 程序存儲(chǔ)器類(lèi)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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*