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HT48RA5 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc |
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HT48RA5 Datasheet(HTML) 3 Page - Holtek Semiconductor Inc |
3 / 38 page Pin Description Pin Name I/O ROM Code Option Description PA0~PA7 I/O Wake-up* Pull-high*** Bidirectional 8-bit input/output port. Each bit can be configured as a wake-up in- put by a option. Software instructions determine the CMOS output or Schmitt trig- ger input with/without pull-high resistor. The pull-high resistor of each input/output line is also optional. PB0/PFD PB1~PB7 I/O Pull-high** PB0 or PFD Bidirectional 8-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with/without pull-high resistor. The pull-high resis- tor of each input/output line is also optional. The output mode of PB0 can be used as an internal PFD signal output and it can be used as a various frequency carrier signal. PC0/TMR0 PC1~PC4 PC5/TMR1 I/O Pull-high* Bidirectional 6-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with/without pull-high resistor. The pull-high resis- tor of each input/output line is also optional. PC0 and PC5 are pin shared with TMR0 and TMR1 function pins. PF0/INT I/O Pull-high* Bidirectional 1-bit input/output port. Software instructions determine the CMOS output or Schmitt trigger input with/without pull-high resistor. The pull-high resis- tor of this input/output line is also optional. PF0 is pin shared with the INT func- tion pin. OSC1 OSC2 I O Crystal or RC OSC1, OSC2 are connected to an RC network or Crystal (determined by option) for the internal system clock. In the case of RC operation, OSC2 is the output terminal for 1/4 system clock. RES I ¾ Schmitt trigger reset input, active low. VSS ¾¾ Negative power supply, ground VDD ¾¾ Positive power supply Note: * Bit option ** Nibble option *** Byte 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........................... -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. HT48RA5/HT48CA5 Rev. 1.40 3 May 22, 2009 |
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