Appendices
Version 4 A-20 4/2/04
FIGURE 4-D – CONTROL U BOARD BLOCK DIAGRAM
MODE
CONTROL
DIP
SWITCH
ALTERA
LOGIC
8
MODE CONTROL
ADATA
ACLK
HI STAB
CONNECTO
R VIA
BACKPLANE
I/F
BUFFERS
BKEY
BDAT
A
BCLK
KEY LINE
DATA
CLOCK
KEY
AT89LS
8252
µP
LED
TX - KEY
5
FREQ SEL
BACKPLANE
BACKPLANE
BACKPLANE
2
5
22
3 4
LED
DISPLAY
4
SC0-SC3
