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HT82K68E-L Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
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HT82K68E-L Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
4 / 38 page Pin Name I/O Mask Option Description PE0~PE1 I/O Pull-high or None Bidirectional input/output port. Software* instruction determine the CMOS output or Schmitt Trigger input with or without pull-high resistor. If PE0 output 1, rising edge of PC2 trigger INT circuit. PE0 output 0, falling edge of PC2 trigger INT circuit. PE2 O This pin is a CMOS output structure. The pad can function as LED (SCR) drivers for the keyboard. IOL=18mA at VOL=3.4V PE3 O This pin is a CMOS output structure. The pad can function as LED (NUM) drivers for the keyboard. IOL=18mA at VOL=3.4V PE4 O This pin is a CMOS output structure. The pad can function as LED (CAP) drivers for the keyboard. IOL=18mA at VOL=3.4V VDD ¾¾ Positive power supply VSS ¾¾ Negative power supply, ground RESET I ¾ Chip reset input. Active low. Built-in power-on reset circuit to reset the entire chip. Chip can also be externally reset via RESET pin OSC1 OSC2 I O Crystal or RC OSC1, OSC2 are connected to an RC network or a crystal for the internal system clock. In the case of RC operation, OSC2 is the output terminal for the 1/4 system clock; A 110k W resistor is connected to OSC1 to generate a 2 MHZ frequency. Note: *: Software means the HT -IDE (Holtek Integrated Development Environment) can be configured by mask option. 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 .......................... -25°Cto70°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 reliability. D.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions VDD Operating Voltage ¾¾ 1.8 ¾ 5.5 V IDD1 Operating Current (Crystal OSC) 3V No load, fSYS= 6MHz ¾ 0.7 1.5 mA 5V ¾ 25 mA IDD2 Operating Current (RC OSC) 3V No load, fSYS= 6MHz ¾ 0.5 1.5 mA 5V ¾ 25 mA ISTB1 Standby Current (WDT enabled) 3V No load, system HALT ¾¾ 8 mA 5V ¾¾ 15 mA ISTB2 Standby Current (WDT Disabled) 3V No load, system HALT ¾¾ 3 mA 5V ¾¾ 6 mA VIL1 Input Low Voltage for I/O Ports (Schmitt) 3V ¾ 0 ¾ 0.3VDD V 5V ¾ 0 ¾ 0.3VDD V VIH1 Input High Voltage for I/O Ports (Schmitt) 3V ¾ 0.7VDD ¾ VDD V 5V ¾ 0.7VDD ¾ VDD V HT82K68E-L/HT82K68A-L Rev. 1.30 4 August 5, 2009 |
Similar Part No. - HT82K68E-L_09 |
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Similar Description - HT82K68E-L_09 |
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