Oki TF-300P, Field Service Manual

Page: 47 / 137

6-8
Normal Cycle With 1 Wait State
bclk
TSTCLK
Bus Cycle
WAITn
Figure 6-2 Bus Cycle (Divide by 3)
6.1.2.2. External Bus Signal Timing
External bus clock and control timing is provided in Figure 6-3 . External bus data access timing is
provided in Figure 6-4 , and Table 6-4 provides the external bus signal timing parameters for both
of these figures.
SYSCLK
TSTCLK
SYNC
RDY
BE
t
S L
t
S H
t
C D
t
CD
t
S YD
t
DBS
t
DBH
t
IS
t
IH
t
HS
t
HH
t
S C Y
t
S Y D
t
RD Y
DEBUGn
EXT IRQ
Figure 6-3 External bus clock and control timing