参数资料
型号: AT91SAM7S321-MU
厂商: Atmel
文件页数: 14/50页
文件大小: 0K
描述: MCU ARM 32K HI SPD FLASH 64-QFN
产品培训模块: SAM9 MPU Boot Solutions & Application Deployment
MCU Product Line Introduction
标准包装: 260
系列: SAM7S
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 55MHz
连通性: I²C,SPI,SSC,UART/USART,USB
外围设备: 欠压检测/复位,DMA,POR,PWM,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: 闪存
RAM 容量: 8K x 8
电压 - 电源 (Vcc/Vdd): 1.65 V ~ 1.95 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 托盘
配用: AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
AT91SAM7S-EK-ND - KIT EVAL FOR ARM AT91SAM7S
21
SAM7S Series [DATASHEET]
6175KS–ATARM–25-Oct-12
8.7
Memory Mapping
8.7.1
Internal SRAM
The SAM7S512 embeds a high-speed 64-Kbyte SRAM bank.
The SAM7S256 embeds a high-speed 64-Kbyte SRAM bank.
The SAM7S128 embeds a high-speed 32-Kbyte SRAM bank.
The SAM7S64 embeds a high-speed 16-Kbyte SRAM bank.
The SAM7S321 embeds a high-speed 8-Kbyte SRAM bank.
The SAM7S32 embeds a high-speed 8-Kbyte SRAM bank.
The SAM7S161 embeds a high-speed 4-Kbyte SRAM bank.
The SAM7S16 embeds a high-speed 4-Kbyte SRAM bank
After reset and until the Remap Command is performed, the SRAM is only accessible at address 0x0020 0000. After
Remap, the SRAM also becomes available at address 0x0.
8.7.2
Internal ROM
The SAM7S Series embeds an Internal ROM. The ROM contains the FFPI and the SAM-BA program.
The internal ROM is not mapped by default.
8.7.3
Internal Flash
The SAM7S512 features two contiguous banks (dual plane) of 256 Kbytes of Flash.
The SAM7S256 features one bank (single plane) of 256 Kbytes of Flash.
The SAM7S128 features one bank (single plane) of 128 Kbytes of Flash.
The SAM7S64 features one bank (single plane) of 64 Kbytes of Flash.
The SAM7S321/32 features one bank (single plane) of 32 Kbytes of Flash.
The SAM7S161/16 features one bank (single plane) of 16 Kbytes of Flash.
At any time, the Flash is mapped to address 0x0010 0000. It is also accessible at address 0x0 after the reset and before
the Remap Command.
Figure 8-2. Internal Memory Mapping
256 MBytes
Flash Before Remap
SRAM After Remap
Undefined Areas
(Abort)
0x000F FFFF
0x001F FFFF
0x002F FFFF
0x0FFF FFFF
1 MBytes
253 MBytes
Internal Flash
Internal SRAM
0x0000 0000
0x0010 0000
0x0020 0000
0x0030 0000
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