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MC81F4432Q 参数 Datasheet PDF下载

MC81F4432Q图片预览
型号: MC81F4432Q
PDF下载: 下载PDF文件 查看货源
内容描述: ABOV半导体的8位单芯片微控制器产品 [ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS]
分类和应用: 半导体微控制器
文件页数/大小: 198 页 / 4293 K
品牌: FINECHIPS [ FINECHIPS ]
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MC81F4432  
10.4 R3 Port Registers  
R3CONH R33~R35  
R3 PORT CONTROL HIGH REGISTER  
00DCH  
A reset clears the R3CONH register to 00H, makes R35-R33 pins input mode. You can use  
R3CONH register setting to select input or output mode (open-drain or push-pull) and enable  
alternative functions.  
7
6
5
4
3
2
1
0
R35  
R34  
R33  
R3CONH  
Reset value: 00H  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
bit7 bit6  
Not used for MC81F4x32  
00: Schmitt trigger input mode  
01: Not available  
R35  
R35/RESETB ( *note* )  
R34/Xin ( *note* )  
10: Output mode, open-drain  
11: Not available  
00: Schmitt trigger input mode  
01: Schmitt trigger input pull-up mode  
10: Output mode, open-drain  
11: Output mode, push-pull  
00: Schmitt trigger input mode  
01: Schmitt trigger input pull-up mode  
10: Output mode, open-drain  
11: Output mode, push-pull  
R34  
R33  
R33/Xout ( *note* )  
Note :  
If you want to use RESETB, the LVREN (ROM OPTION [7]) must select to LVR disable  
mode (1). If you want to use R35, the LVREN (ROM OPTION [7]) must be selected to LVR  
enable mode („0).  
If you want to use XIN and XOUT, the OSCS (ROM OPTION [2:0]) must select to  
Crystal/ceramic oscillator mode (111b). If you want to use R33 and R34, the OSCS (ROM  
OPTION [2:0]) must select to Internal RC mode (001b, 010b, 011b, 100b).  
Even you are in case of using emulator you must select the ROM OPTION switch properly to  
use those R33,R34,R35 ports.  
October 19, 2009 Ver.1.35  
81