mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 117

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908BD48
Freescale Semiconductor
1 µF
1 µF
2
3
5
DB9
+
+
7
8
1
3
4
5
C1+
C1–
C2+
C2–
NOTES:
MAX232
—
Rev. 2.1
Position A — Bus clock = OSCXCLK ÷ 4
Position B — Bus clock = OSCXCLK ÷ 2
GND
V
V+
V–
CC
16
15
2
10
6
9
V
DD
+
Figure 9-1. Monitor Mode Circuit
+
1 µF
1 µF
2
74HC125
1
+
3
1 µF
Monitor ROM (MON)
74HC125
6
V
TST
4
5
V
DD
10 k
20 pF
1 k
8.5 V
20 pF
10 kΩ
(See
NOTES)
9.83 MHz
V
DD
A
X1
B
0.1 µF
0.1 µF
10 MΩ
V
10 kΩ
10 kΩ
10 kΩ
DD
V
Monitor ROM (MON)
V
V
DD
DD
DD
OSC1
OSC2
PTC0
PTC1
PTA7
68HC908BD48
RST
V
V
V
IRQ
PTA0
PTC3
Data Sheet
SS
SS1
DD
117