EKA/DET

 FREMO Contents   FREMO-STW   ZNF800   

What does EKA and DET stand for?

German terms for a user interface device:

Abbr. German Einglish description
EKA Eingabekontrollanzeige "Input control display" - 32 characters of alpha numeric LED dot matrix display
DET Dateneingabetastatur "Data Input Keypad" - a numeric key pad with a load of additional function keys
foto

Team work

This device is a real team effort. It consists of the following components:

External interfaces

Internal interfaces

The processor board has five connectors for (more or less byte wide) ports in the same style as the STK500 development board:

Bit0   1 2   Bit1
Bit2   3 4   Bit3
Bit4   5 6   Bit5
Bit6   7 8   Bit7
GND   9 10     Vcc

EKA - Display

Address: Port B = SV13

Control: Port A = SV14

Data: Port F = SV16

Connector Processor Display
1 PORTB0 N.C.
2 PORTB1 N.C.
3 PORTB2 A0
4 PORTB3 A1
5 PORTB4 A2
6 PORTB5 A3
7 PORTB6 A4
8 PORTB7 FL
9 GND
10 Vcc
Connector Processor Display
1 PORTA0 /RD
2 PORTA1 /WR
3 PORTA2 /RST
4 PORTA3 N.C.
5 PORTA4 /CE1
6 PORTA5 /CE2
7 PORTA6 /CE3
8 PORTA7 /CE4
9 GND
10 Vcc
Connector Processor Display
1 PORTF0 D0
2..7 ... ...
8 PORTF7 D7
9 GND
10 Vcc

DET - key pad

1 2 3 4 5 6 7 8
d 7 8 9 H F (d)(o)ZNL
c 4 5 6 UHRVG (e)(a)ANZ
b 1 2 3 R ANB ? (b)SPE
a 0 L T LOEANNLOZ(c)ZNS
This table shows the keypad with the button labels (white background) and the names of the colums (1..8) and rows (d..a).
(o) = name of own US
(a) to (e) = names of neighbour US

Rows: Port C = SV12

Columns: Port D = SV11

DET seen from below

Connector Processor Display
1 PORTC0 d
2 PORTC1 c
3 PORTC2 b
4 PORTC3 a
5 PORTC4 N.C.
6 PORTC5 N.C.
7 PORTC6 N.C.
8 PORTC7 N.C.
9 GND N.C.
10 Vcc N.C.
Connector Processor Display
1 PORTD0 1
2 PORTD1 2
3 PORTD2 3
4 PORTD3 4
5 PORTD4 5
6 PORTD5 6
7 PORTD6 7
8 PORTD7 8
9 GND N.C.
10 Vcc N.C.
thumbnail

Little breadboard below the DET:

cable to processor boards
1 2 3 4 5 6 7 8 d c a b
left
columns
right
columns
- rows
cable to key matrix

The pink pins are swapped

 FREMO Contents   FREMO-STW   ZNF800   
Author of this page: Stefan Bormann. Valid HTML 4.01 Transitional SourceForge.net Logo