欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: MC68HC05X4CDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: HCMOS Microcontroller Unit
中文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封裝: PLASTIC, SOIC-28
文件頁數: 64/156頁
文件大小: 926K
代理商: MC68HC05X4CDW
Parallel input/output ports
MC68HC05X4 Rev 1.0
64
Parallel input/output ports
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
Input/output programming
Bi-directional port lines may be programmed as inputs or outputs under
software control. The direction of each pin is determined by the state of
the corresponding bit in the port data direction register (DDR). Each port
has an associated DDR. Any I/O port pin is configured as an output if its
corresponding DDR bit is set. A pin is configured as an input if its
corresponding DDR bit is cleared.
At power-on or reset, all DDRs are cleared, thus configuring all port pins
as inputs. The data direction registers can be written to or read by the
processor. During the programmed output state, a read of the data
register actually reads the value of the output data latch and not the I/O
pin. Refer to
Figure 1
and
Table 1
.
Port A
Port A is an 8-bit bi-directional port. The port A data register is at $0000
and the data direction register (DDR) is at $0004. Reset does not affect
the data register, but clears the data direction register, thereby returning
the ports to inputs. Writing a ‘1’ to a DDR bit sets the corresponding port
pin to output mode.
Figure 1. Standard I/O port structure
Latched data
register bit
DDRn
DATA
Input
buffer
Output
buffer
O/P
data
buffer
M
DDRn
1
1
0
0
DATA
0
1
0
1
I/O pin
0
1
tristate
tristate
I/O
Pin
Output
Input
Data direction
register bit
2-ports
F
Freescale Semiconductor, Inc.
n
.
相關PDF資料
PDF描述
MC68HC05X4DW HCMOS Microcontroller Unit
MC68HC705X4 HCMOS Microcontroller Unit
MC68HC705X4CDW HCMOS Microcontroller Unit
MC68HC705X4DW HCMOS Microcontroller Unit
MC68HC08AB16A Low Cost HCMOS Microcontroller(低成本、8位HCMOS微控制器)
相關代理商/技術參數
參數描述
MC68HC05X4DW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC08AB16A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC08AB16AD 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC08AZ0 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Advance Information
MC68HC08AZ0CFU 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Advance Information
主站蜘蛛池模板: 张家口市| 辽宁省| 奉贤区| 锦州市| 来宾市| 洞口县| 龙里县| 收藏| 南涧| 元谋县| 漳平市| 本溪市| 赤壁市| 女性| 文登市| 锦州市| 兴山县| 西青区| 鄂州市| 河池市| 嘉兴市| 博罗县| 汉中市| 广昌县| 东方市| 桑日县| 定襄县| 新乡县| 珠海市| 新兴县| 织金县| 贞丰县| 株洲县| 井冈山市| 沅陵县| 峡江县| 禹城市| 古交市| 隆回县| 韩城市| 宣恩县|