Peripheral Circuit Of Microcomputer - Hitachi RAM-130QH5 Service Manual

7. Peripheral circuit of microcomputer

Fig. 7-1 shows the microcomputer and its peripheral circuits.
●
Table 7-1, the basic operations of each circuit block, and Fig. 7-2, the system configuration.
SPM
terminal
DC current
Detection resistor
R24
0V
C224
0V
R245
C282
Is
CT1
D104 R110 R338
C103
R108
0V
0V
0V
Fig. 7-1 Peripheral circuit of microcomputer (AX-6V01)
5V
R290
Q209 Q205
R291
0V
5V
8 IC4
5
7
6
4
R249
R247
0V
0V
5V
D205
R222
C105
R221
0V
– 69 –
12V
Outdoor
Microcomputer
(AX-6V01)
48
Reset
0V
9 IP cutter
SPM
terminal
60
Id
R248
C281
0V
61
Is
C283
0V