mc68hc908qb4 Freescale Semiconductor, Inc, mc68hc908qb4 Datasheet - Page 198

• Manufacturer Part Number: mc68hc908qb4
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Development Support
198
2
3
5
2
3
5
1 μF
1 μF
1 μF
1 μF
DB9
DB9
+
+
+
+
7
8
1
3
4
5
1
3
4
5
7
8
C1+
C1–
C2+
C2–
C1+
C1–
C2+
C2–
Figure 17-10. Monitor Mode Circuit (External Clock, with High Voltage)
Figure 17-11. Monitor Mode Circuit (External Clock, No High Voltage)
MAX232
MAX232
V+
V–
V+
V–
16
15
2
10
6
1 μF
16
15
2
10
6
9
1 μF
9
V
DD
V
+
+
DD
+
+
1 μF
2
2
1 μF
MC68HC908QB8 Data Sheet, Rev. 2
74HC125
74HC125
1
1
+
3
3
1 μF
+
74HC125
1 μF
74HC125
6
6
4
4
10 kΩ
10 kΩ
5
5
V
V
DD
V
DD
9.8304 MHz CLOCK
TST
10 kΩ
9.8304 MHz CLOCK
9.1 V
1 kΩ
10 kΩ
*
V
* Value not critical
DD
*
N.C.
RST (PTA3)
OSC1 (PTA5)
IRQ (PTA2)
PTA0
RST (PTA3)
OSC1 (PTA5)
IRQ (PTA2)
PTA0
Freescale Semiconductor
PTA1
PTA4
V
V
DD
SS
PTA1
PTA4
V
* Value not critical
V
DD
SS
10 kΩ
10 kΩ
V
DD
V
N.C.
0.1 μF
*
N.C.
DD
*
0.1 μF
V
DD