mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 166

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Development Support
16.3.1.1 Normal Monitor Mode
Data Sheet
166
2
3
5
1 µF
1 µF
DB9
+
+
1
3
4
5
7
8
C1+
C1–
C2+
C2–
Figure 16-13. Monitor Mode Circuit (Internal Clock, No High Voltage)
MAX232
RST and OSC1 functions will be active on the PTA3 and PTA5 pins respectively
as long as V
then the chip will still be operating in monitor mode, but the pin functions will be
determined by the settings in the configuration registers (see
Configuration Register
the BIH and BIL instructions will read the IRQ pin state only if IRQEN is set in the
CONFIG2 register.
If monitor mode was entered with V
as V
TST
V+
V–
Freescale Semiconductor, Inc.
16
15
2
10
6
1 µF
9
is applied to IRQ.
For More Information On This Product,
V
TST
DD
+
+
1 µF
2
is applied to the IRQ pin. If the IRQ pin is lowered (no longer V
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74HC125
1
+
Development Support
3
1 µF
74HC125
6
(CONFIG)) when V
4
10 kΩ
5
V
DD
10 kΩ
TST
*
* Value not critical
on IRQ, then the COP is disabled as long
N.C.
N.C.
TST
RST (PTA3)
OSC1 (PTA5)
IRQ (PTA2)
PTA0
was lowered. With V
MC68HC908QF4 — Rev. 1.0
Section 5.
PTA1
PTA4
V
V
DD
SS
TST
MOTOROLA
V
N.C.
N.C.
DD
lowered,
0.1 µF
TST
)