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HT68FU50 数据表(PDF) 73 Page - Holtek Semiconductor Inc |
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HT68FU50 数据表(HTML) 73 Page - Holtek Semiconductor Inc |
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73 / 244 page  HT68F20/HT68F30/HT68F40/HT68F50/HT68F60 HT68FU30/HT68FU40/HT68FU50/HT68FU60 Rev. 1.50 73 March 15, 2011 Pin-remapping Functions The flexibility of the microcontroller range is greatly enhanced by the use of pins that have more than one function. Limited numbers of pins can force serious design constraints on designers but by supplying pins with multi-functions, many of these difficulties can be overcome. The way in which the pin function of each pin is selected is different for each function and a priority order is established where more than one pin function is selected simultaneously. Additionally there are a series of PRM0, PRM1 and PRM2 registers to establish certain pin functions. Pin-remapping Registers The limited number of supplied pins in a package can impose restrictions on the amount of functions a certain device can contain. However by allowing the same pins to share several different functions and providing a means of function selection, a wide range of different functions can be incorporated into even relatively small package sizes. Some de- vices include PRM0, PRM1 or PRM2 registers which can select the functions of certain pins. · Pin-remapping Register List ¨ HT68F30 Register Name Bit 76543210 PRM0 ¾¾¾¾¾ PCPRM SIMPS0 PCKPS ¨ HT68F40 Register Name Bit 76543210 PRM0 ¾ C1XPS0 ¾ C0XPS0 PDPRM SIMPS1 SIMPS0 PCKPS PRM1 TCK2PS TCK1PS TCK0PS ¾ INT1PS1 INT1PS0 INT0PS1 INT0PS0 PRM2 ¾¾ TP21PS TP20PS TP1B2PS TP1APS TP01PS TP00PS ¨ HT68F50 Register Name Bit 76543210 PRM0 ¾ C1XPS0 ¾ C0XPS0 PDPRM SIMPS1 SIMPS0 PCKPS PRM1 TCK2PS TCK1PS TCK0PS ¾ INT1PS1 INT1PS0 INT0PS1 INT0PS0 PRM2 TP31PS TP30PS TP21PS TP20PS TP1B2PS TP1APS TP01PS TP00PS ¨ HT68F60 Register Name Bit 76543210 PRM0 C1XPS1 C1XPS0 C0XPS1 C0XPS0 PDPRM SIMPS1 SIMPS0 PCKPS PRM1 TCK2PS TCK1PS TCK0PS INT2PS1 INT1PS1 INT1PS0 INT0PS1 INT0PS0 PRM2 TP31PS TP30PS TP21PS TP20PS TP1B2PS TP1APS TP01PS TP00PS |
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