EM83055H datasheet(2/22 Pages) EMC

2 / 22 page

* This specification are subject to be changed without notice.

9.25.2001

EM83055H

KEYBOARD ENCODER

PIN DESCRIPTIONS

Symbol

I/O

Function

P50

Column 3 Low output scan line, 3-state

P51

Column 4 Low output scan line, 3-state

P52

Column 5 Low output scan line, 3-state

P53

Column 6 Low output scan line, 3-state

P54

Column 7 Low output scan line, 3-state

P55

Column 14 Low output scan line, 3-state

P56

Column 13 Low output scan line, 3-state

P57

Column 12 Low output scan line, 3-state

P80

Column 11 Low output scan line, 3-state

P81

Column 15 Low output scan line, 3-state

P82

Column 10 Low output scan line, 3-state

P83

Column 8 Low output scan line, 3-state

P84

Column 9 Low output scan line, 3-state

P85

Column 0 Low output scan line, 3-state

P86

Column 16 Low output scan line, 3-state

P87

Column 17 Low output scan line, 3-state

P90

Column 1 Low output scan line, 3-state

P91

Column 2 Low output scan line, 3-state

VSS

Ground

SCROLL

Scroll Lock Indicator

NUM

NUM Lock Indicator

CAPS

Caps Lock Indicator

P60

Row 0 Input scan line, internal pull high ( 17K

Ω )

P61

Row 1 Input scan line, internal pull high ( 17K

Ω )

P62

Row 2 Input scan line, internal pull high ( 17K

Ω )

P63

Row 3 Input scan line, internal pull high ( 17K

Ω )

P64

Row 4 Input scan line, internal pull high ( 17K

Ω )

P65

Row 5 Input scan line, internal pull high ( 17K

Ω )

P66

Row 6 Input scan line, internal pull high ( 17K

Ω )

P67

Row 7 Input scan line, internal pull high ( 17K

Ω )

CLK

I/O

CLOCK line for IBM communication , internal pull high ( 2.2K

Ω )

DATA

I/O

DATA line for IBM communication , internal pull high ( 2.2K

Ω )

+5V Power Supply

OSCO

CLOCK output

R_OSCI

Connect 51K OHM resistor for 1.8432 MHz oscillation

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