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參數(shù)資料
| 型號： | MC68HC05P9DWR2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 44/88頁 |
| 文件大?。?/td> | 6557K |
| 代理商： | MC68HC05P9DWR2 |
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6
MC68HC05E0
MOTOROLA
6-1
PARALLEL INPUT/OUTPUT PORTS
6
PARALLEL INPUT/OUTPUT PORTS
6.1
Bidirectional Ports
Ports A, B, C, and D are bidirectional 8-bit ports and Port E is a 4-bit bidirectional port and may be
congured as inputs or outputs under software control. The Port E lines are associated with bits
0–3 in the Port E data and data direction registers. The direction of any port line is determined by
the state of the corresponding bit in the data direction register (DDR). Any port line is congured
as an output if its corresponding DDR bit set to a logic one. A pin is congured as an input if its
DDR bit is cleared to a logic zero. At power-on or reset, all DDRs are cleared to $00 (with the
exception of DDRE which is set to $F0), which congures all I/O lines as inputs. (Note that, on
reset, bit 0 of the Port D Mode register is set to one, thereby forcing Port D bit 0 to output the P02
clock signal.) All data and data direction registers can be written to and read by the CPU. Refer to
53
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05P9P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
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| MC68HC05RC16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05RC16DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
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