HT82K94E datasheet(4/43 Pages) HOLTEK

4 / 43 page

Pin Name

I/O

ROM Code

Option

Description

VSS

¾¾

Negative power supply, ground

RES

Schmitt trigger reset input. Active low

VDD

¾¾

Positive power supply

V33O

3.3V regulator output

USBD+/CLK

I/O

USBD+ or PS2 CLK I/O line

USB or PS2 function is controlled by software control register

USBD-/DATA

I/O

USBD- or PS2 DATA I/O line

USB or PS2 function is controlled by software control register

OSC1

OSC2

OSC1, OSC2 are connected to a 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...............................0

°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

¾ fSYS=6MHz

2.2

5.5

¾ fSYS=12MHz

2.2

5.5

IDD1

Operating Current (6MHz Crystal)

No load, fSYS=6MHz

6.5

IDD2

Operating Current (12MHz Crystal)

No load, fSYS=12MHz

7.5

ISTB1

Standby Current (WDT Enabled)

No load, system HALT,

USB suspend

¾¾

250

ISTB2

Standby Current (WDT Disabled)

No load, system HALT,

USB suspend

¾¾

230

ISTB3

Standby Current (WDT Enabled)

No load, system HALT,

input/output mode,

set SUSPEND2 [1EH]

¾¾

VIL1

Input Low Voltage for I/O Ports

TTL level

0.8

VIH1

Input High Voltage for I/O Ports

TTL level

VIL2

Input Low Voltage (RES)

CMOS level

0.4VDD

VIH2

Input High Voltage (RES)

CMOS level

0.9VDD

VDD

IOL1

I/O Port Sink Current for PA1~PA7,

PB, PC, PD

VOL=3.4V

IOL2

I/O Port Sink Current for PA1~PA7,

PB, PC, PD

VOL=0.4V

248

IOL3

I/O Port Sink Current for PA0

VOL=0.4V

HT82K94E/HT82K94A

Rev. 1.50

October 11, 2007

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