參數(shù)資料
型號(hào)： AT91SAM7S256C-MU
廠商： Atmel
文件頁數(shù)： 165/165頁
文件大?。?/td> 0K
描述： IC ARM7 MCU 32BIT 256K 64QFN
標(biāo)準(zhǔn)包裝： 260
系列： SAM7S
核心處理器： ARM7
芯體尺寸： 16/32-位
速度： 55MHz
連通性： I²C，SPI，SSC，UART/USART，USB
外圍設(shè)備： 欠壓檢測/復(fù)位，DMA，POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲(chǔ)器容量： 256KB（256K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 64K x 8
電壓 - 電源 (Vcc/Vdd)： 1.65 V ~ 1.95 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 64-VFQFN 裸露焊盤
包裝： 托盤
99
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
If an access is done in the address area 0x0030 000 to 0x003F FFFF, no abort is generated.
Figure 18-3. Internal Memory Mapping
18.3.2.2
Internal Memory Area 0
The first 32 bytes of Internal Memory Area 0 contain the ARM processor exception vectors, in particular, the Reset
Vector at address 0x0.
Before execution of the remap command, the on-chip Flash is mapped into Internal Memory Area 0, so that the
ARM7TDMI reaches an executable instruction contained in Flash. After the remap command, the internal SRAM at
address 0x0020 0000 is mapped into Internal Memory Area 0. The memory mapped into Internal Memory Area 0 is
accessible in both its original location and at address 0x0.
18.3.3
Remap Command
After execution, the Remap Command causes the Internal SRAM to be accessed through the Internal Memory
Area 0.
As the ARM vectors (Reset, Abort, Data Abort, Prefetch Abort, Undefined Instruction, Interrupt, and Fast Interrupt)
are mapped from address 0x0 to address 0x20, the Remap Command allows the user to redefine dynamically
these vectors under software control.
The Remap Command is accessible through the Memory Controller User Interface by writing the MC_RCR
(Remap Control Register) RCB field to one.
The Remap Command can be cancelled by writing the MC_RCR RCB field to one, which acts as a toggling com-
mand. This allows easy debug of the user-defined boot sequence by offering a simple way to put the chip in the
same configuration as after a reset.
18.3.4
Abort Status
There are three reasons for an abort to occur:
access to an undefined address
an access to a misaligned address.
When an abort occurs, a signal is sent back to all the masters, regardless of which one has generated the access.
However, only the ARM7TDMI can take an abort signal into account, and only under the condition that it was gen-
erating an access. The Peripheral DMA Controller does not handle the abort input signal. Note that the connection
is not represented in Figure 18-1.
256M Bytes
Internal Memory Area 0
Undefined Areas
(Abort)
0x0000 0000
0x000F FFFF
0x0010 0000
0x001F FFFF
0x0020 0000
0x002F FFFF
0x0FFF FFFF
1M Bytes
253M bytes
Internal Memory Area 1
Internal Flash
Internal Memory Area 2
Internal SRAM
0x0030 0000
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AT91SAM7S256C-MU-999 功能描述:ARM微控制器 - MCU 256K Flash SRAM 64K ARM based MCU 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(shí)鐘頻率:72 MHz 程序存儲(chǔ)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
AT91SAM7S256D-AU 功能描述:ARM微控制器 - MCU 256K Flash SRAM 64K ARM based MCU 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(shí)鐘頻率:72 MHz 程序存儲(chǔ)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
AT91SAM7S256D-AU-999 制造商:Atmel Corporation 功能描述:AT91SAM7S256D-AU-999 制造商:Atmel Corporation 功能描述:LQFP, GREEN, IND TEMP, T&R, MRL D - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU ARM7 256KB FLASH 64LQFP 制造商:Atmel Corporation 功能描述:LQFP Green IND TEMP T&R, MRL D 制造商:Atmel 功能描述:AT91SAM7S256D-AU-999
AT91SAM7S256D-MU 制造商:Atmel Corporation 功能描述:MCU 32-bit SAM7S ARM7TDMI RISC 256KB Flash 1.8V/3.3V 64-Pin QFN EP 制造商:Atmel Corporation 功能描述:QFN, GREEN, IND TEMP, MRL D - Bulk 制造商:Atmel Corporation 功能描述:IC MCU ARM7 256KB FLASH 64QFN 制造商:Atmel Corporation 功能描述:ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
AT91SAM7S256D-MU-999 制造商:Atmel Corporation 功能描述:QFN,GREEN,IND TEMP,T&R, MRL D 制造商:Atmel Corporation 功能描述:QFN,GREEN,IND TEMP,T&R, MRL D - Tape and Reel 制造商:Atmel 功能描述:ARM 制造商:Atmel Corporation 功能描述:IC MCU ARM7 256KB FLASH 64QFN 制造商:Atmel Corporation 功能描述:QFN GREEN IND TEMP T&R, MRL D
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