MC68HC908LB8_05 Datasheet, PDF (212/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Development Support
N.C.
RST (PTA5)
1 µF
1 µF
DB9
2
3
5
MAX232
1 _C1+
+
3 _C1–
4 _C2+
+
5 _C2–
7
8
V_DD
16
+ _{1 µF}
15
1 µF
+
V+ ²
V– ⁶
1 µF
10
9
V_DD
+
10 kΩ
74HC125
6
5
74HC125
2
3
4
9.8304 MHz CLOCK
V_DD
10 kΩ*
OSC1 (PTC0)
IRQ (PTC2)
PTA0
1
V_DD
V_DD
0.1 µF
PTA1
N.C.
PTA4
N.C.
V_SS
* Value not critical
Figure 19-11. Forced Monitor Mode Circuit (External Clock, No High Voltage)
N.C.
RST (PTA5)
1 µF
1 µF
DB9
2
3
5
MAX232
1 _C1+
+
3 _C1–
4 _C2+
+
5 _C2–
7
8
V_DD
N.C.
16
15
V+ ²
V– ⁶
+
1 µF
1 µF
+
10 kΩ*
V_DD
1 µF ₊
10 kΩ
74HC125
10
6
5
74HC125
9
2
3
4
1
OSC1 (PTC0)
IRQ (PTC2)
PTA0
V_DD
V_DD
0.1 µF
PTA1
N.C.
PTA4
N.C.
V_SS
* Value not critical
Figure 19-12. Forced Monitor Mode Circuit (Internal Clock, No High Voltage)
MC68HC908LB8 Data Sheet, Rev. 1
212
Freescale Semiconductor