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REV.-A
AO-A3
SLA7620M
'"3
Constant Current
Supply Circuit
Tl-
J~
SCK
ADDRESS DEC ODER
RCK
MODE SELECTOR
PtA
CPU
MMU
e-------------
--
pta
(laC)
I--
(8B)
"PtTM"
-
PI
TMI
AUTO
PHASE
MMJOI031
CE
SWITHING
PORT
P1-P
DCU
~
12Al
Figure 2-25. Paper Feed Motor and Control Circuit Block Diagram
n-
Il.l"
1.1.
J I
"
11:
~l
JJ
JJ II
11111
I....,
r
.,
III
r.
~
r
r
-,
r-
I~
L
U
W
L J W
~
i
6V
6V
6
ne
~me
Upper step: TM1 signal
Lower step: PFA/A signal
Figure 2·26. TM 1 Signal and PFAIA Signal Operation Wave Forms
Drive
Current
Phase
Swithing
Speed
I
r--_.l.IlI.QIII.CA~
0.04AI
0
•
74A
I
I------------------l-
I
I
I
I
I
I
I
:.
..:.
..:,.
3.Conatant-Sp.ed
.:.
.:.
.:
I.Pre-Drive Z.Acceleration Control
4.Deceleratlon 5.Post-Drlve
Rush Control
Control
Rush
Figure 2·27. Paper Feed Motor Control Sequence
2-27
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