Monitor Mode Circuit - Motorola MC68HC908AB32 Technical Data Manual

1
+
10 µF
3
4
10 µF
+
2
DB-25
2 5
3 6
7
NOTES:
Position A — Bus clock = CGMXCLK ÷ 4 or CGMVCLK ÷ 4
Position B — Bus clock = CGMXCLK ÷ 2
MC68HC908AB32 Rev. 1.0
—
MOTOROLA
20
MC145407
+
10 µF
18
17
10 µF
+
19
16
15
Figure 10-1. Monitor Mode Circuit
Monitor ROM (MON)
X1
V
20 pF
DD
4.9152 MHz
20 pF
V
DD
1 14
MC74HC125
2 3
6 5
4
V
DD
10 kΩ
7
A
(See
NOTES)
Monitor ROM (MON)
Functional Description
V
DD
MC68HC908AB32
10 kΩ
RST
0.1 µF
V
TST
10 Ω
IRQ
V
A
DD
V
A
DD
V
CGMXFC
0.1 µF
OSC1
10 MΩ
OSC2
V
SS
V
DD
V
DD
0.1 µF
V
DD
10 kΩ
PTA0
PTC3
V
DD
10 kΩ
PTC0
PTC1
B
Technical Data
159