Pin Name

I/O

ROM Code

Option

Description

PD0~PD3

PD4/TMR0

PD5~PD7

I/O

Pull-high

Wake-up

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by

pull-high options).

Wake-up options: PD0~PD7

PD4 is pin-shared with TMR0 input.

PE0~PE7

I/O

Pull-high

Wake-up

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by

pull-high options).

Wake-up options: PE0~PE7

VSS

¾¾

Negative power supply, ground

RES

I

¾

Schmitt trigger reset input. Active low

VDD

¾¾

Positive power supply

V33O

O

¾

3.3V regulator output

USBD+/CLK

I/O

¾

USBD+ or PS2 CLK I/O line

USB or PS2 function is controlled by software control register

USBD-/DATA

I/O

¾

USBD- or PS2 DATA I/O line

USB or PS2 function is controlled by software control register

OSC1

OSC2

I

O

¾

OSC1, OSC2 are connected to a 6MHz or 12MHz Crystal/resonator

(determined by software instructions) for the internal system clock.

Absolute Maximum Ratings

Storage Temperature ............................

-50°Cto125°C

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

Conditions

Operating Voltage

2.3

¾

5.5

V

3.0

¾

5.5

V

Operating Current (6MHz Crystal)

5V

¾

6.5

12

mA

Operating Current (12MHz Crystal)

5V

¾

7.5

16

mA

Standby Current

5V

No load, system HALT,

USB suspend*

¾¾

500

mA

Standby Current (WDT Enabled)

5V

No load, system HALT,

input/output mode,

set SUSPEND2 [1EH]

¾¾

15

mA

Input Low Voltage for I/O Ports

5V

TTL level

0

¾

0.8

V

Input High Voltage for I/O Ports

5V

TTL level

2

¾

V

Input Low Voltage (RES)

5V

CMOS level

0

¾

V

Input High Voltage (RES)

5V

CMOS level

¾

V

HT82K94E/HT82K94A

Rev. 2.40

4

November 5, 2014