收藏本站
140
XMEGA A [MANUAL]
8077I–AVR–11/2012
13.10 Clock and Event Output
It is possible to output the peripheral clock and event channel 0 events to a pin. This can be used to clock, control, and
synchronize external functions and hardware to internal device timing. The output port pin is selectable. If an event
occurs, it remains visible on the port pin as long as the event lasts; normally one peripheral clock cycle.
13.11 Multi-pin Configuration
The multi-pin configuration function is used to configure multiple port pins using a single write operation to only one of the
port pin configuration registers. A mask register decides which port pin is configured when one port pin register is written,
while avoiding several pins being written the same way during identical write operations.
13.12 Virtual Ports
Virtual port registers allow the port registers to be mapped virtually in the bit-accessible I/O memory space. When this is
done, writing to the virtual port register will be the same as writing to the real port register. This enables the use of I/O
memory-specific instructions, such as bit-manipulation instructions, on a port register that normally resides in the
extended I/O memory space. There are four virtual ports, and so four ports can be mapped at the same time.
13.13 Register Descriptions – Ports
13.13.1 DIR – Data Direction register
Bit 7:0 – DIR[7:0]: Data Direction
This register sets the data direction for the individual pins of the port. If DIRn is written to one, pin n is configured as an
output pin. If DIRn is written to zero, pin n is configured as an input pin.
13.13.2 DIRSET – Data Direction Set register
Bit 7:0 – DIRSET[7:0]: Port Data Direction Set
This register can be used instead of a read-modify-write to set individual pins as output. Writing a one to a bit will set the
corresponding bit in the DIR register. Reading this register will return the value of the DIR register.
13.13.3 DIRCLR – Data Direction Clear register
Bit 7:0 – DIRCLR[7:0]: Port Data Direction Clear
Bit
7
6
5
4
3
2
1
0
+0x00
DIR[7:0]
Read/Write
R/W
Initial Value
0
Bit
7
6
5
432
10
+0x01
DIRSET[7:0]
Read/Write
R/W
Initial Value
0
Bit
7
6
5
4
3
2
1
0
+0x02
DIRCLR[7:0]
Read/Write
R/W
Initial Value
0
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
21FMN-BMTTR-A-TB CONN FMN HSNG 21POS STAG REV SMD
PIC16LF87-I/ML IC MCU FLASH 4KX14 EEPROM 28QFN
PIC24HJ32GP204-I/PT IC PIC MCU FLASH 32K 44TQFP
20FMN-BMTTR-A-TB CONN FMN HSNG 20POS STAG REV SMD
PIC16F88-I/SS IC MCU FLASH 4KX14 EEPROM 20SSOP
18FMN-BMTTR-A-TB CONN FMN HSNG 18POS STAG REV SMD
17FMN-BMTTR-A-TB CONN FMN HSNG 17POS STAG REV SMD
PIC18LF46J11-I/ML IC PIC MCU FLASH 64K 2V 44-QFN
相关代理商/技术参数
PIC18F4450T-I/ML 功能描述:8位微控制器 -MCU 16KB FL 768 RAM 34 I/O FS-USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F4450T-I/PT 功能描述:8位微控制器 -MCU 16KB FL 768 RAM 34 I/O FS-USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F4455-BL 制造商:POWERLITE SYSTEMS 功能描述:PIC18F445 W/ BOOTLOADER FOR FLASHLAB 制造商:POWERLITE SYSTEMS 功能描述:PIC18F445 W/ BOOTLOADER, FOR FLASHLAB 制造商:POWERLITE SYSTEMS 功能描述:PIC18F445 W/ BOOTLOADER, FOR FLASHLAB; Silicon Manufacturer:Powerlite Systems; Core Architecture:PIC; Kit Contents:Board; Features:Bootloader Programming, RS232 Connector for Boot-Loading and Serial Comms ;RoHS Compliant: Yes
PIC18F4455-I/ML 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F4455-I/P 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F4455-I/PT 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F4455T-I/ML 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F4455T-I/PT 功能描述:8位微控制器 -MCU 24kBF 2048RM FSUSB2 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT