MC68HC908GZ8 Datasheet, PDF (151/344 Pages) Motorola, Inc – Microcontrollers

Monitor ROM (MON)
Functional Description
MC68HC908GZ8
V_DD
1 µF
1 µF
DB9
2
3
5
1 _C1+
+
3 _C1–
4 _C2+
+
5 _C2–
7
8
MAX232
V_CC ¹⁶
GND ¹⁵
V+ ²
V– ⁶
10
9
N.C.
47 pF
V_DD
+ _{1 µF}
1 µF
+
27 pF
8 MHz
10 MΩ
1 kΩ
+ ^{1 µF}
74HC125
6
5
74HC125
2
3
4
V_DD
9.1 V
10 kΩ
RST
OSC2
OSC1
IRQ
PTA0
1
V_DD
V_DDA
0.1 µF
V_DD
10 k
PTB4
10 k
PTB0
10 k
PTB1
10 k
PTA1
V_SSA
V_SS
Figure 15-2. Normal Monitor Mode Circuit
47 pF
1 µF
1 µF
DB9
2
3
5
1 _C1+
+
3 _C1–
4 _C2+
+
5 _C2–
7
8
MAX232
V_CC ¹⁶
GND ¹⁵
V+ ²
V– ⁶
10
9
V_DD
+ _{1 µF}
1 µF
+
27 pF
8 MHz
V_DD
+ ^{1 µF}
74HC125
6
5
74HC125
2
3
4
10 kΩ
1
MC68HC908GZ8
N.C.
RST
OSC2
10 MΩ
OSC1
V_DD
V_DDA
V_DD
0.1 µF
N.C.
IRQ
PTA0
PTB4
PTB0
PTB1
PTA1
N.C.
N.C.
N.C.
10 k
V_SSA
V_SS
Figure 15-3. Forced Monitor Mode
MC68HC908GZ8
Freescale Semiconductor
Monitor ROM (MON)
Data Sheet
151