参数资料
型号: ATSAM3X4EA-CU
厂商: Atmel
文件页数: 26/71页
文件大小: 0K
描述: IC MCU 2X128KB CORTEX-M3 144-BGA
标准包装: 160
系列: SAM3X
核心处理器: ARM? Cortex?-M3
芯体尺寸: 32-位
速度: 84MHz
连通性: CAN,EBI/EMI,以太网,I²C,IrDA,LIN,MMC,SPI,SSC,UART/USART,USB
外围设备: 欠压检测/复位,DMA,I²S,POR,PWM,WDT
输入/输出数: 103
程序存储器容量: 256KB(256K x 8)
程序存储器类型: 闪存
RAM 容量: 68K x 8
电压 - 电源 (Vcc/Vdd): 1.62 V ~ 1.95 V
数据转换器: A/D 16x12b,D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 144-LFBGA
包装: 托盘
34
11057BS–ATARM–13-Jul-12
SAM3X/A
34
11057BS–ATARM–13-Jul-12
SAM3X/A
7.6
DMA Controller
Acting as one Matrix Master
Embeds 4 (SAM3A and 100-pin SAM3X) or 6 (144-pin SAM3X) channels
Linked List support with Status Write Back operation at End of Transfer
Word, HalfWord, Byte transfer support.
Handles high speed transfer of SPI0-1, USART0-1, SSC and HSMCI (peripheral to memory,
memory to peripheral)
Memory to memory transfer
Can be triggered by PWM and T/C which enables to generates waveform though the
External Bus Interface
The DMA controller can handle the transfer between peripherals and memory and so receives
the triggers from the peripherals below. The hardware interface numbers are also given in Table
7-5.
Table 7-4.
DMA Channels
DMA Channel Size
SAM3A
100-pin SAM3X
144-pin SAM3X
8 bytes FIFO for Channel Buffering
3
(Channels 0, 1 and 2)
4
(Channels 0, 1, 2 and 4)
32 bytes FIFO for Channel Buffering
1
(Channel 3)
2
(Channels 3 and 5)
Table 7-5.
DMA Controller
Instance Name
Channel T/R
DMA Channel HW
Interface Number
HSMCI
Transmit/Receive
0
SPI0
Transmit
1
SPI0
Receive
2
SSC
Transmit
3
SSC
Receive
4
SPI1
Transmit
5
SPI1
Receive
6
TWI0
Transmit
7
TWI0
Receive
8
--
-
--
-
USART0
Transmit
11
USART0
Receive
12
USART1
Transmit
13
USART1
Receive
14
PWM
Transmit
15
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