Canon A-200 series Service Manual page 81

113
.,",
RESET
."
A2
'"'
105
104
ID3
102
'"'
,­
"
'"'
"
;I'
~
lCX5
115
lCX5
l)
ClK ClR
U128
6D 60
5D
50
4D 40
3D
30
~
132
132
CN15
I
DRIVEl
DRIVEO
I
L__
RESET
IRO
U124
~
~134"'\
--Y
PIC
IR06
2M
ClK
DREO
10 10
2D 20
FD C
,...-­
3D
30
­
4 D _ 40
ClR
(
~
-
DRE02
DMAC
DACK
I-.
I'-"
-
J l14
r
113
,..
DACK2
Figure 6-23
• Pre-Compensation Circuit
This circuit advances or delays write data for 125 nano seconds sent from the FOC to the FOO
according to the data pattern. The FOC changes the status of the
PSO
and
PS1
terminals in re­
sponse to a pattern of the write data sent from the CPU.
PSO PS1
L
L Normal
L
H Late
H
L Early
78