Brother International HL 1850 Service Manual - Page 80
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CHAPTER 3 THEORY OF OPERATION (2) USB interface Stores the data received from the PC into DRAM as controlled by the DMA controller. The transmission speed is 12Mbps. ,00 ( CCM JL: 4j7 - t V. aeLe ct. oe Fun:. Z73 :I/ a 0 is Mot e, g0-s- = a=41 :a Pvt.e. a'uxTh o M He VOI-,45 .03 I 0,0 6 ,3 2:0 as as ':G= :C922. 08/ 03 c. 6.Ct .. .03 .03 ue .23 Mt.,: M. PO Gym 6- 4:0 my .235 3003 O O sic O 033g tool 3A, IVO 11,1 0,23 2110 Fig. 3-4 (3) Engine GA transfer circuit Communicates with the engine GA by a full-duplex synchronous serial method. The communication speed is 520Kbps. oa rsrox %COX . 3111.07 3430I-332 230 003 303 FU,SS- ,cce-sn 3. - 333 le£ -300 108 126 120 037.30 3-4
CHAPTER
3
THEORY
OF
OPERATION
(2)
USB
interface
Stores
the
data
received
from
the
PC
into
DRAM
as
control
led
by
the
DMA
control
ler.
The
transmission
speed
is
12Mbps.
JL:
4j7
-
t
eLe
a
V.
ct.
Mot
e
,
g0
—s—
PO
=
e.
aux
'
Th
o
a
a=41
:
Pvt.
oe
Fun:.
Z73
:I/
a
0
is
CCM
,00
(
6
,
3
2:0
as
as
M
He
ue
':G
=
.23
:C922. Mt.,:
G
ym
08/
M.
03
VOI-,45
c.
6.Ct
.03
..
.03
I
.03
0,0
sic
3003
my
.235
O
O
O
6
-
4:0
03
3
g
0,23
2110
Fig.
3-4
IVO
tool
3
A,
11,1
(3)
Engine
GA
transfer
circuit
Communicates
with
the
engine
GA
by
a
ful
l
-duplex
synchronous
serial
method.
The
communication
speed
is
520Kbps.
%COX
.
3111.07
3430I-332
oa
rsrox
003
230
303
FU,SS-
,cce-sn
3.
-
333
le£
-300
108
126
120
037.30
3-4