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HT46R51 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc |
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HT46R51 Datasheet(HTML) 3 Page - Holtek Semiconductor Inc |
3 / 42 page Pin Description Pin Name I/O Options Description PA0~PA2 PA3/PFD PA4/TMR PA5/INT PA6~PA7 I/O Pull-high Wake-up PA3 or PFD Bidirectional 8-bit input/output port. Each individual bit on this port can be config- ured as a wake-up input by configuration option. Software instructions determine if the pin is a CMOS output or Schmitt trigger input. Configuration options deter- mine which pins on this port have pull-high resistors. The PFD, TMR and external interrupt input are pin-shared with PA3, PA4, and PA5 respectively. PB0/AN0 PB1/AN1 PB2/AN2 PB3/AN3 PB4/AN4 I/O Pull-high Bidirectional 5-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with or without pull-high resistor. Configuration op- tions determine which pins on this port have pull-high resistors. PB is pin-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. PD0/PWM I/O Pull-high PD0 or PWM Bidirectional 1-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with or without pull-high resistor. One configuration option determines which pin on this port has pull-high resistor. PD0 is pin-shared with the PWM output selected via configuration option. OSC1 OSC2 I O Crystal or RC OSC1, OSC2 are connected to an external RC network or external crystal (deter- mined by configuration option) for the internal system clock. For external RC sys- tem clock operation, OSC2 is an output pin for 1/4 system clock. RES I ¾ Schmitt trigger reset input, active low VDD ¾¾ Positive power supply VSS ¾¾ Negative power supply, ground VREF I ¾ A/D Converter Reference Input voltage pins. Connect this pin to the desired A/D reference voltage. The VREF pin is connected to VDD for the 18-pin DIP package 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 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 reliabil- ity. D.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions VDD Operating Voltage ¾ fSYS=4MHz 2.2 ¾ 5.5 V fSYS=8MHz 3.3 ¾ 5.5 V IDD1 Operating Current (Crystal OSC) 3V No load, fSYS=4MHz ADC disabled ¾ 0.6 1.5 mA 5V ¾ 24 mA IDD2 Operating Current (RC OSC) 3V No load, fSYS=4MHz ADC disabled ¾ 0.8 1.5 mA 5V ¾ 2.5 4 mA IDD3 Operating Current 5V No load, fSYS=8MHz ADC disabled ¾ 48 mA ISTB1 Standby Current (WDT Enabled) 3V No load, system HALT ¾¾ 5 mA 5V ¾¾ 10 mA HT46R51/HT46R52 Rev. 1.40 3 July 12, 2005 |
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