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HT68F04C Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
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HT68F04C Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
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4 / 142 page  Pin Description With the exception of the power pins, all pins on these devices can be referenced by their Port name, e.g. PA.0, PA.1 etc, which refer to the digital I/O function of the pins. However these Port pins are also shared with other function such as the Analog to Digital Converter, Serial Port pins etc. The function of each pin is listed in the following table, however the details behind how each pin is configured is contained in other sections of the datasheet. The following tables only include the pins which are directly related to the MCU. The pin descriptions of the additional peripheral functions are located at the end of the datasheet along with the relevant peripheral function functional de- scription. HT66F03C Pin Name Function OP I/T O/T Pin-Shared Mapping PA0~PA2, PA5~PA7 Port A PAWU PAPU ST CMOS ¾ AN0~AN2 A/D converter input ACERL AN ¾ PA0~PA2 VREF A/D converter reference input ADCR1 AN ¾ PA1 C- Comparator input CPC AN ¾ PA1 C+ Comparator input AN ¾ PA0 CX Comparator output ¾ CMOS PA2 TCK0 TM0 input PRM ST ¾ PA6 or PA7 TCK1 TM1 input PRM ST ¾ PA7 TP0 TM0 I/O PRM ST CMOS PA5 or PA2 TP1 TM1 I/O PRM ST CMOS PA6 or PA7 INT External Interrupt ¾ ST ¾ PA7 OSC1 HXT/ERC/LXT pin CO HXT LXT ¾ PA6 OSC2 HXT/LXT pin CO ¾ HXT LXT PA5 RES Reset pin CO ST ¾ PA7 VDD Power supply * ¾ PWR ¾¾ AVDD A/D converter power supply * ¾ PWR ¾¾ VSS Ground ** ¾ PWR ¾¾ AVSS A/D converter ground ** ¾ PWR ¾¾ Note: I/T: Input type; O/T: Output type OP: Optional by configuration option (CO) or register option PWR: Power; CO: Configuration option; ST: Schmitt Trigger input CMOS: CMOS output; NMOS: NMOS output SCOM: Software controlled LCD COM; AN: Analog input pin HXT: High frequency crystal oscillator LXT: Low frequency crystal oscillator The important point to note here is that the PA3 and PA4 pads are not bonded to the external pins in the 8-pin DIP/NSOP package. Users should take special care of these two pads. Refer to the Programming consider- ations in Input/Output Ports section for more details. *: VDD is the device power supply while AVDD is the ADC power supply. The AVDD pin is bonded together internally with VDD. **: VSS is the device ground pin while AVSS is the ADC ground pin. The AVSS pin is bonded together internally with VSS. HT66F03C/HT66F04C/HT68F03C/HT68F04C Rev. 0.00 4 February 26, 2010 Preliminary |
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