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68HC705JJ7_1 参数 Datasheet PDF下载

68HC705JJ7_1图片预览
型号: 68HC705JJ7_1
PDF下载: 下载PDF文件 查看货源
内容描述: 常规版本规格 [General Release Specification]
分类和应用:
文件页数/大小: 230 页 / 5548 K
品牌: FREESCALE [ Freescale ]
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Freescale Semiconductor, Inc.  
Parallel Input/Output  
Port C (28-Pin Versions Only)  
7.5 Port C (28-Pin Ve rsions Only)  
Port C is a 8-bit, general-purpose bidirectional I/O port with these  
features:  
• Individual programmable pulldown devices  
• High current sinking capability on all port C pins, with a maximum  
total for port C  
• High current sourcing capability on all port C pins, with a maximum  
total for port C  
7.5.1 Port C Da ta Re g iste r (PORTC)  
The port C data register contains a bit for each of the port C pins. When  
a port C pin is programmed to be an output, the state of its data register  
bit determines the state of the output pin. When a port C pin is  
programmed to be an input, reading the port C data register returns the  
logic state of the pin.  
$0002  
Read:  
Write:  
Reset:  
Bit 7  
PC7  
6
5
4
3
2
1
Bit 0  
PC0  
PC6  
PC5  
PC4  
PC3  
PC2  
PC1  
Unaffected by Reset  
Figure 7-13. Port C Data Register (PORTC)  
PC7–PC0 — Port C Data Bits  
These read/write bits are software programmable. Data direction of  
each bit is under the control of the corresponding bit in the port C data  
direction register (DDRC). Reset has no effect on port C data.  
MC68HC705JJ7/MC68HC705JP7 Rev. 3.0  
General Release Specification  
Parallel Input/Output  
For More Information On This Product,  
Go to: www.freescale.com  
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