MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 116

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
116
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
2
3
5
1 F
1 F
DB9
2
3
5
1 F
1 F
DB9
+
+
7
8
1
3
4
5
+
+
C1+
C1–
C2+
C2–
Figure 9-1. Monitor Mode Circuit (External Clock, No High Voltage)
1
3
4
5
7
8
Figure 9-2. Monitor Mode Circuit (Internal Clock, No High Voltage)
C1+
C1–
C2+
C2–
MAX232
MAX232
V+
V–
V+
V–
16
15
2
10
6
1 F
9
16
15
2
10
6
1 F
9
V
DD
+
+
V
1 F
DD
2
+
+
1 F
74HC125
2
1
74HC125
+
1
3
1 F
Monitor ROM (MON)
+
3
74HC125
1 F
6
74HC125
6
4
10 k
5
4
10 k
5
V
DD
V
DD
10 k
9.8304 MHz CLOCK
10 k
*
N.C.
N.C.
* Value not critical
*
N.C.
* Value not critical
RST (PTA3)
OSC1 (PTA5)
IRQ (PTA2)
PTA0
RST (PTA3)
OSC1 (PTA5)
IRQ (PTA2)
PTA0
PTA1
PTA4
V
V
DD
SS
PTA1
PTA4
V
V
DD
SS
MOTOROLA
V
N.C.
DD
N.C.
V
0.1 F
N.C.
N.C.
DD
0.1 F