Motorola MCS 2000 Service Instructions Manual page 193

10-45
BUS-
C0435
VR0419
470pF
10V
C0436
10V
470pF
VR0420
BUS+
R0414
SCI_TX
22K
BUSY_OUT
BUSY
R0428
RESET_OUT
47K
LH_RESET
C0440
VR0422
470pF
10V
Figure 10-31. Controller, SCI Drivers Schematic Diagram
December 6, 2004
+5V
R0409
2.2K
R0408
Q0400
10K
R0410
100
+5V
R0412
470
U0401-2
+5V 6 8
MC33072
C0437 7
33pF
5
4
R0407
470
R0411
100
Q0402
R0413
Q0401
10K
R0415
2.2K
Vdd
Q0408
Vdd
R0468
4.7K
R0431
4.7K
47K
R0429
22K
47K
Q0425
Q0409
C0441
R0430
470pF
10K
R0020
10K
R0021
10K
Vdd
R0424
4.7K
VR0421 C0438
10V 470pF
Q0406
Vdd
R0426
4.7K
R0425
470
Q0407
R0427 C0439
200 470pF
MAEPF-28107-O
Chapter 10: Digrams and Parts Lists:
SCI_RX
SCI_ECHO
BUS_SCI
BUSY_IN
RESET_IN
CLOSED_RESET
68P81083C20-D