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HT46R14A Datasheet(PDF) 3 Page - Holtek Semiconductor Inc |
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HT46R14A Datasheet(HTML) 3 Page - Holtek Semiconductor Inc |
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3 / 49 page  Pin Description Pin Name I/O Options Description PA0/PPG1 PA1~PA2 PA3/PFD PA4/TMR0 PA5/INT0 PA6/INT1 PA7/TMR1 I/O Pull-high Wake-up PA3 or PFD Bidirectional 8-bit input/output port. Each pin can be configured as a wake-up input by configuration option. Software instructions determine if the pin is a CMOS output or Schmitt trigger input. Configuration options determine which pins on the port have pull-high resistors. The PFD, INT0 and INT1 are pin-shared with PA3, PA5 and PA6. The TMR0 is pin-shared with PA4, TMR1 is pin shared with PA7, respectively. The PPG1 is a programmable pulse generator1 output pin, pin shared with PA0. The PPG1 or I/O function is selected via configuration option. The PPG1 output pin is floating during power-on reset, RES pin reset or LVR reset. The PPG1 output level (active low or active high) can be selected via configuration option. PB0/AN0~ PB7/AN7 I/O Pull-high Bidirectional 8-bit input/output port. Software instructions determine if the pin is a CMOS output or Schmitt trigger input. Configuration options determine which pins on the port have pull-high resistors. PB is shared with the A/D input pins. The A/D inputs are selected via software instructions. Once selected as an A/D input, the I/O function and pull-high resistor functions are disabled automatically. PC0/C0VIN- PC1/C0VIN+ PC2/C0OUT PC3/C1OUT PC4/C1VIN- C1VIN+ I/O Pull-high I/O or Comparator Bi-directional 5-bit input/output port. Software instructions determine if the pin is a CMOS output or Schmitt trigger input. A configuration option determines if all pins on the the port have pull-high resistors. C0VIN-, C0VIN+ and C0OUT are pin-shared with PC0, PC1 and PC2. Once the comparator 0 is enabled, the inter- nal PC2 port control register can be used as input only, the PC2 output function and the PC0/PC1/PC2 pull-high resistors will be disabled automatically, however PC0 and PC1 maintain their I/O function. Software instructions determine if the Comparator 0 function is enabled or not. C1VIN+ and C1VIN- are the Comparator 1 inputs, C1OUT and C1VIN- are pin-shared with PC3 and PC4. Once the Comparator 1 function is enabled, the in- ternal PC3 port control register can be used as input only, the PC3 output function and the PC3/PC4 pull-high resistors will be disabled automatically, however PC4 maintains its I/O function. Software instructions determine if the Comparator 1 function is enabled or not. The PC1/C0VIN+ pin is also the external interrupt input pin. A falling edge on this pin will form an interrupt trigger source whether the pin is setup as a Comparator input or I/O pin. PPG0 O ¾ Programmable pulse generator 0 output pin, the pin is floating when the power is first applied. The PPG0 output level can be selected to be either active low or active high, selected via configuration option. OSC1 OSC2 I O Crystal or RC OSC1, OSC2 are connected to an RC network or a Crystal (determined by op- tion) for the internal system clock. If the RC system clock option is selected, pin OSC2 can be used to monitor the system clock at 1/4 frequency. RES I ¾ Schmitt trigger reset input. Active low. VDD ¾¾ Positive power supply VSS ¾¾ Negative power supply, ground. Absolute Maximum Ratings Supply Voltage ...........................VSS -0.3V to VSS+6.0V Storage Temperature ............................ -50°Cto125°C Input Voltage..............................VSS -0.3V to VDD+0.3V Operating Temperature........................... -40°Cto85°C IOL Total ..............................................................150mA IOH Total............................................................ -100mA Total Power Dissipation .....................................500mW Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. HT46R14A Rev. 1.00 3 August 3, 2007 |
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