參數(shù)資料
型號(hào)： ATSAM3S-EK2
廠商： Atmel
文件頁(yè)數(shù)： 14/57頁(yè)
文件大?。?/td> 0K
描述： EVAL KIT FOR SAM3S8 & SAM3SD8
設(shè)計(jì)資源： SAM3S-EK2 Design & Mfg Files
SAM3S-EK2 Design & Mfg Files Information
SAM3S-EK2 Demo Release Notes
標(biāo)準(zhǔn)包裝： 1
類型： MCU
適用于相關(guān)產(chǎn)品： ATSAM3S 系列
所含物品： 板
21
11090BS–ATARM–22-Oct-13
SAM3S8/SD8 Summary
6.
Input/Output Lines
The SAM3S8/SD8 has several kinds of input/output (I/O) lines such as general purpose I/Os
(GPIO) and system I/Os. GPIOs can have alternate functionality due to multiplexing capabilities
of the PIO controllers. The same PIO line can be used whether in I/O mode or by the multiplexed
peripheral. System I/Os include pins such as test pins, oscillators, erase or analog inputs.
6.1
General Purpose I/O Lines
GPIO Lines are managed by PIO Controllers. All I/Os have several input or output modes such
as pull-up or pull-down, input Schmitt triggers, multi-drive (open-drain), glitch filters, debouncing
or input change interrupt. Programming of these modes is performed independently for each I/O
line through the PIO controller user interface. For more details, refer to the product “PIO Control-
ler” section.
The input/output buffers of the PIO lines are supplied through VDDIO power supply rail.
The SAM3S8/SD8 embeds high speed pads able to handle up to 32 MHz for HSMCI (MCK/2),
45 MHz for SPI clock lines and 35 MHz on other lines. See AC Characteristics Section of the
datasheet for more details. Typical pull-up and pull-down value is 100 k
Ω for all I/Os.
Each I/O line also embeds an ODT (On-Die Termination), (see Figure 6-1 below). It consists of
an internal series resistor termination scheme for impedance matching between the driver out-
put (SAM3S8/SD8) and the PCB trace impedance preventing signal reflection. The series
resistor helps to reduce IOs switching current (di/dt) thereby reducing in turn, EMI. It also
decreases overshoot and undershoot (ringing) due to inductance of interconnect between
devices or between boards. In conclusion ODT helps diminish signal integrity issues.
Figure 6-1.
On-Die Termination
6.2
System I/O Lines
System I/O lines are pins used by oscillators, test mode, reset and JTAG to name but a few.
Described below in Table 6-1are the SAM3S8/SD8 system I/O lines shared with PIO lines.
These pins are software configurable as general purpose I/O or system pins. At startup the
default function of these pins is always used.
PCB Trace
Z0 ~ 50 Ohms
Receiver
SAM3 Driver with
Rodt
Zout ~ 10 Ohms
Z0 ~ Zout + Rodt
ODT
36 Ohms Typ.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATSAM3U 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91 ARM Thumb-based Microcontrollers
ATSAM3U_10 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91ARM Cortex M3-based Microcontrollers
ATSAM3U1CA-AU 功能描述:ARM微控制器 - MCU 64K Flash, 20K SRAM 32-bit ARM Cortex M3 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
ATSAM3U1CA-CU 功能描述:ARM微控制器 - MCU 64K Flash, 20K SRAM 32-bit ARM Cortex M3 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
ATSAM3U1CB-AU 功能描述:ARM微控制器 - MCU LQFP, Grn, IT, MRL B 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
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