參數(shù)資料
型號: ATSAM3X4CA-AU
廠商: Atmel
文件頁數(shù): 26/71頁
文件大小: 0K
描述: IC MCU 2X128KB CORTEX-M3 100-QFP
標(biāo)準(zhǔn)包裝: 90
系列: SAM3X
核心處理器: ARM? Cortex?-M3
芯體尺寸: 32-位
速度: 84MHz
連通性: CAN,以太網(wǎng),I²C,IrDA,LIN,MMC,SPI,SSC,UART/USART,USB
外圍設(shè)備: 欠壓檢測/復(fù)位,DMA,I²S,POR,PWM,WDT
輸入/輸出數(shù): 63
程序存儲器容量: 256KB(256K x 8)
程序存儲器類型: 閃存
RAM 容量: 64K x 8
電壓 - 電源 (Vcc/Vdd): 1.62 V ~ 1.95 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 16x12b,D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-LQFP
包裝: 托盤
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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