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HT48RB8 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
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HT48RB8 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
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4 / 45 page  Pin Name I/O ROM Code Option Description VSS ¾¾ Negative power supply, ground PC0~PC7 I/O Pull-high Bidirectional I/O lines. Software instructions determine the CMOS out- put or Schmitt trigger input with pull-high resistor (determined by pull-high options). PC0 can be used as USB mouse IRPT control pin for mouse hardware wake-up function RES I ¾ Schmitt trigger reset input. Active low VDD ¾¾ Positive power supply V33O O ¾ 3.3V regulator output USBD+ I/O ¾ USBD+ I/O line USBD- I/O ¾ USBD- OSC1 OSC2 I O ¾ OSC1, OSC2 are connected to an 6MHz or 12MHz Crystal/resonator (determined by software instructions) for the internal system clock. 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=6MHz 4.4 ¾ 5.5 V fSYS=12MHz 4.4 ¾ 5.5 V IDD1 Operating Current (6MHz Crystal) 5V No load, fSYS=6MHz ¾ 6.5 12 mA IDD2 Operating Current (12MHz Crystal) 5V No load, fSYS=12MHz ¾ 7.5 16 mA ISTB1 Standby Current (WDT Enabled) 5V No load, system HALT, USB suspend ¾¾ 250 mA ISTB2 Standby Current (WDT Disabled) 5V No load, system HALT, USB suspend ¾¾ 230 mA VIL1 Input Low Voltage for I/O Ports ¾¾ 0 ¾ 0.3VDD V VIH1 Input High Voltage for I/O Ports ¾¾ 0.7VDD ¾ VDD V VIL2 Input Low Voltage (RES)5V ¾ 0 ¾ 0.4VDD V VIH2 Input High Voltage (RES)5V ¾ 0.9VDD ¾ VDD V IOL1 I/O Port Sink Current for PB, PC1~PC7, PD 5V VOL=3.4V 12 17 ¾ mA IOL2 I/O Port Sink Current for PB, PC1~PC7, PD 5V VOL=0.4V 24 ¾ mA IOL3 I/O Port Sink Current for PA 5V VOL=0.4V 510 ¾ mA IOL4 I/O Port Sink Current for PC0 5V VOL=0.4V 10 25 ¾ mA HT48RB8 Rev. 1.30 4 February 10, 2003 |
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