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參數(shù)資料
| 型號： | AT91R40008-66AU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 2/19頁 |
| 文件大小： | 0K |
| 描述： | IC ARM7 MCU 100 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： | 90 |
| 系列： | AT91 |
| 核心處理器： | ARM7 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 66MHz |
| 連通性： | EBI/EMI，UART/USART |
| 外圍設(shè)備： | POR，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 256K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 100-LQFP |
| 包裝： | 托盤 |
| 配用： | AT91EB40A-ND - KIT EVAL FOR ARM AT91R40008 |
10
1732FS–ATARM–12-Apr-06
AT91R40008
The BMS pin is multiplexed with the I/O line P24, which can be programmed after reset like
any standard PIO line.
7.6.3
Remap Command
The ARM vectors (Reset, Abort, Data Abort, Pre-fetch 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 AT91R40008 microcontroller uses a Remap
command that enables switching between the boot memory and the internal primary 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 manda-
tory 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.
7.6.4
Abort Control
The abort signal providing a Data Abort or a Pre-fetch Abort exception to the ARM7TDMI is
asserted when accessing an undefined address in the EBI address space.
No abort is generated when reading the internal memory or by accessing the internal peripher-
als, whether or not the address is defined.
7.6.5
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 1M byte banks up to four 16M bytes banks. 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 is too long in releasing the bus)
Data bus width (8-bit or 16-bit)
The user can program the EBI to control one 16-bit device (Byte Select Access mode) with a
16-bit wide data bus or two 8-bit devices in parallel that emulate a 16-bit memory (Byte Write
Access mode).
The External Bus Interface also features the Early Read Protocol, configurable for all the
devices, which significantly reduces access time requirements on an external device in the
case of single-clock cycle access.
Table 7-1.
Boot Mode Select
BMS
Boot Memory
1
External 8-bit memory on NCS0
0
External 16-bit memory on NCS0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT91R40008-66AU SL383 | 制造商:Atmel Corporation 功能描述:MCU 32-Bit 91R ARM7TDMI RISC ROMLess 1.8V 100-Pin LQFP T/R |
| AT91R40008-66AU | 制造商:Atmel Corporation 功能描述:IC 32-BIT MCU ARM7 66MHZ 100-LQFP |
| AT91R40008-66AU-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 |
| AT91R40807 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91R40807_02 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
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