Canon A-200 series Service Manual page 67

T3 T4 T1 T2 T3 Tw Tw Tw Tw Tw Tw T4
CPU·ClK
JI
II II II II II II II II II II
!I~
___
(ClK)
DMA·ClK
(DClK)
SO- S2
HRQ
~
(DMAC)
___--1,­
DMA·GO
HOLDA
(DMAC)
- - - _ ...
_ - - _
....
_ - _
.... - - - _ ....
_--_
...
- - - -
- - - - - - - ,
AEN
AEN
(BCU, CEN)
m
RDY1
~
DMA-ADDR
DACK
MRD, MWR'
__
---'r---------~---------------------------------------~ ~
lOR, lOW
(BCU)
MRD, lOR
----------------------------~,- -.~~
__________________________Jl------'----------------------------------­
(DMAC)
lOW,
MWR
______________________________
~r__ ---~
I
-~~-----------------------------------
(DMAC)
DMA-RDY
(DMAC)
DMA CYCLE
Figure 6-14