Sharp PC-4741 Service Manual page 14

®
7.16 MHz SLOW cycle
(10,
DMA, REFRESH cycle)
CPUCLK
SVLD
~
SYSCLK
ALE
-
P C-4741
SMRDSIORD
----------------,-------~----------------------------~--~------+--------
SMWR SIOWR·CPU CYCLES
SMWR SIOWR·DMA AND REFRESH CYCLES
iTHisf;EcnON--·
j
~~~~~~~~G~H!~:
L
STC ______________________
~---J
: FALLlMG EDGES :
OF CPUClK
RDYV40
................................. l ............... , .............
O'R.I.~~~.B.Y.~9.~~1~
.........
1 ......
T .........
~.I:'I!!!!'t>I.~:-!.f!IO!I.D:-!
...... .
READY=1
SLOCYC=1
®
10 MHz MEDIUM cycle
T1 T2 T3 TW TW T4
CPUCLK
n n n n
n
I
I
SVLD - - - - '
SYSCLK
_ _ _ _ _ _ _ _
~
_ _ _ _ _ _ -J
ALE -----'
SMRDSIORD-------------------------------.----------~--~----~---------+--------­
SMWR SIOWR·CPU CYCLES
SMWR SIOWR·DMA CYCLES
'·"THis·sECTioN"'-- i
STC
-----------------------------------------;----+---~i ~e~~~~G~H1~E l
, • : FALlIMG EOGES :
L
, : . ww®w .
. .
Ro.y'l~O
····· ... ··· ............. ·····•·· .. ·· ..
·····f········gB!Y~ft~XH~].~.1L
•.•
I.··.·R:~t~~:[lR.I.\I!'t>I.~:-!.f!!'''I?:-!
.•.•..•...••. : ... : ... :: .
SLOCYC=O
-13-