参数资料
型号: ATSAM3N2BA-MU
厂商: Atmel
文件页数: 18/60页
文件大小: 0K
描述: MCU FLASH 64-QFN
产品培训模块: Touch Solutions on the Atmel ARM? Cortex?-M3 Based Flash Microcontrollers
特色产品: SAM3N Flash MCU
标准包装: 260
系列: SAM3N
核心处理器: ARM? Cortex?-M3
芯体尺寸: 32-位
速度: 48MHz
连通性: I²C,IrDA,SPI,UART/USART
外围设备: 欠压检测/复位,DMA,POR,PWM,WDT
输入/输出数: 47
程序存储器容量: 128KB(128K x 8)
程序存储器类型: 闪存
RAM 容量: 16K x 8
电压 - 电源 (Vcc/Vdd): 1.62 V ~ 3.6 V
数据转换器: A/D 10x10b,D/A 1x10b
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
25
11011BS–ATARM–22-Feb-12
SAM3N Summary
Notes:
1. If PB12 is used as PIO input in user applications, a low level must be ensured at startup to prevent Flash erase before the
user application sets PB12 into PIO mode.
2. In the product Datasheet Refer to: Slow Clock Generator of the Supply Controller section.
3. In the product Datasheet Refer to: 3 to 20 MHZ Crystal Oscillator information in the PMC section.
6.2.1
Serial Wire JTAG Debug Port (SWJ-DP) Pins
The SWJ-DP pins are TCK/SWCLK, TMS/SWDIO, TDO/SWO, TDI and commonly provided on
a standard 20-pin JTAG connector defined by ARM. For more details about voltage reference
and reset state, refer to Table 3-1 on page 7.
At startup, SWJ-DP pins are configured in SWJ-DP mode to allow connection with debugging
probe. Please refer to the Debug and Test Section of the product datasheet.
SWJ-DP pins can be used as standard I/Os to provide users more general input/output pins
when the debug port is not needed in the end application. Mode selection between SWJ-DP
mode (System IO mode) and general IO mode is performed through the AHB Matrix Special
Function Registers (MATRIX_SFR). Configuration of the pad for pull-up, triggers, debouncing
and glitch filters is possible regardless of the mode.
The JTAGSEL pin is used to select the JTAG boundary scan when asserted at a high level. It
integrates a permanent pull-down resistor of about 15 k
Ω to GND, so that it can be left uncon-
nected for normal operations.
By default, the JTAG Debug Port is active. If the debugger host wants to switch to the Serial
Wire Debug Port, it must provide a dedicated JTAG sequence on TMS/SWDIO and
TCK/SWCLK which disables the JTAG-DP and enables the SW-DP. When the Serial Wire
Debug Port is active, TDO/TRACESWO can be used for trace.
The asynchronous TRACE output (TRACESWO) is multiplexed with TDO. So the asynchronous
trace can only be used with SW-DP, not JTAG-DP. For more information about SW-DP and
JTAG-DP switching, please refer to the Debug and Test Section.
Table 6-1.
System I/O Configuration Pin List.
SYSTEM_IO
bit number
Default function
after reset
Other function
Constraints for
normal start
Configuration
12
ERASE
PB12
Low Level at
startup(1)
In Matrix User Interface Registers
(Refer to the System I/O
Configuration Register in the Bus
Matrix section of the product
datasheet.)
7
TCK/SWCLK
PB7
-
6
TMS/SWDIO
PB6
-
5
TDO/TRACESWO
PB5
-
4
TDI
PB4
-
PA7
XIN32
-
See footnote (2) below
-
PA8
XOUT32
-
PB9
XIN
-
See footnote (3) below
-
PB8
XOUT
-
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