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HT95R64 Datasheet(PDF) 65 Page - Holtek Semiconductor Inc |
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HT95R64 Datasheet(HTML) 65 Page - Holtek Semiconductor Inc |
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65 / 82 page  Configuration Options Configuration options refer to certain options within the MCU that are programmed into the device during the program- ming process. During the development process, these options are selected using the HT-IDE software development tools. As these options are programmed into the device using the hardware programming tools, once they are selected they cannot be changed later by the application software. All options must be defined for proper system function, the details of which are shown in the table. Name Options I/O Options Wake-up PA Port A wake-up selection. Defines the activity of wake-up function. All port A have the capability to wake-up the device from a Power-down condition. This wake-up function is selected per bit. Pull-high PA Pull-high PC0~PC1 Pull-high PC4~PC7 Pull-high PD Pull-high PE Pull-high PF Pull-high option. This option determines whether the pull-high resistance is viable or not. Port A pull-high option is selected per bit. Port C pull-high option is selected per bit. Port D pull-high option is selected per nibble. Port E pull-high option is selected per nibble. Port F pull-high option is selected per nibble. Watchdog Options CLRWDT This option defines how to clear the WDT by instruction. One clear instruction ® The ²CLR WDT² can clear the WDT. Two clear instructions ® Only when both of the ²CLR WDT1² and ²CLR WDT2² have been executed, then WDT can be cleared. WDT Watchdog enable/disable WDT Clock Source WDT clock source selection RC ® Select the WDT OSC to be the WDT source. T1 ® Select the instruction clock to be the WDT source. 32kHz ® Select the external 32768Hz to be the WDT source. PDF Options PA3 Normal I/O or PFD output PFD source Timer0 or Timer1 overflow LVR Options LVR Low Voltage Reset enable or disable LVR Voltage Low Voltage Reset voltage; 2.1V, 3.15V or 4.2V SPI Options SIM Enable/disable SPI_WCOL Enable/disable SPI_CSEN Enable/disable, used to enable/disable (1/0) software CSEN function I 2C Option I 2C debounce Time No debounce, 1 system clock debounce, 2 system clock debounce RNIC I 2C running not using internal clock VDDIO Options VDDIO disable/enable (This pin is used as GPIO/PE4 when disabled) VDDIO PE0 use VDD or VDDIO (when VDDIO is disabled, PE0~3 use VDD as power always) VDDIO PE1 use VDD or VDDIO VDDIO PE2 use VDD or VDDIO VDDIO PE3 use VDD or VDDIO HT95R64/HT95R65 Rev. 1.00 65 March 3, 2010 |
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