MC68HC908GR8A_07 Datasheet, PDF (223/260 Pages) Freescale Semiconductor, Inc – Microcontrollers

Monitor Module (MON)
MC68HC908GR8A
V_DD
1 μF
1 μF
DB9
2
3
1 _C1+
+
3 _C1–
4 _C2+
+
5 _C2–
7
8
MAX232
V_CC ¹⁶
GND ¹⁵
V+ ²
V– ⁶
10
9
N.C.
33 pF
V_DD
+
1 μF
1 μF
+
33 pF
10 MΩ
9.8304 MHz
1 kΩ
1 μF
+
74HC125
6
5
74HC125
2
3
4
V_DD
8.5 V
10 kΩ
RST
OSC2
OSC1
IRQ
PTA0
5
1
V_DD
V_DDA
0.1 μF
V_DD
10 k
PTB0
10 k
PTB1
10 k
PTA1
V_SSA
V_SS
Figure 18-10. Normal Monitor Mode Circuit
MC68HC908GR8A
V_DD
1 μF
1 μF
DB9
2
3
1 _C1+
+
3 _C1–
MAX232
V_CC ¹⁶
GND ¹⁵
V_DD
+
1 μF
1 μF
+
33 pF
N.C.
RST
OSC2
33 pF
9.8304 MHz
10 MΩ
OSC1
4 _C2+
+
5 _C2–
7
8
V+ ²
V– ⁶
10
9
V_DD
1 μF
+
74HC125
6
5
74HC125
2
3
4
10 kΩ
N.C.
IRQ
PTA0
5
1
V_DD
V_DDA
0.1 μF
PTB0
N.C.
PTB1
N.C.
10 k
PTA1
V_SSA
V_SS
Figure 18-11. Forced Monitor Mode
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
Freescale Semiconductor
223