Tektronix 2430 - Readout State Machine Flow Chart

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Figure 3-8. Readout State Machine flow chart.
~ IIA TCH FOR CHARA CTER
ADD R E SS "63 ".
SELE CT 05 OF U2 30
~ DELA Y
~ C LOCK DI SP LA Y
COUN TE R (C L KR AM ) .
IIAT CHFO R EOL
(EN D OF LI NE) .
SELEC T 0 4 O F U 230
- SELECT 03 OF U230
- S E LE CT 0 2 O F U 23 0
- SELECT 00 O F U 23 0
NOTE , ----A
LOAD~L Y
CLOCK~
NO T E , TIME BETIIEEN"STATES" ,
IIHETHERCLOC K ED OR
LOADED , I S 200ns
(1 CLO CK CY CLE)
Theory of Operation-2430 Service
TURN OFF "Rl ON" AND _,..
CL O CK DOT COU NT ER
(CK DO TCTC)
TURN ON R lON _,..
DE L A Y _,..
IIAT CH F OR EOC H LO _,..
(E N D OF CH ARACT E R)
DELA Y _,..
DEL A Y _,..
CLOCK T H E DIS PLA Y _,..
COUN TE R (CLK RA M ) A ND
IIAT CHF OR CHARA CTER
ADDRES S "11"
DELAY 1 C L OCK (2 00ns ) _,..
IIAT CH" RO" A T _,..
00 OF U23 0
(DI SP LA Y READ OUT)
"STATE " ADDRE SS TO
U23 2 AN D U3 3 0 -" 0 "
READOU T
ST ATE - MA CHIN E