Power Supply Bypassing; External Reset Pin (Rst) - Motorola MC68HC908GP32 Technical Data Manual

General Description
1.6.2 Oscillator Pins (OSC1 and OSC2)

1.6.3 External Reset Pin (RST)

1.6.4 External Interrupt Pin (IRQ)
Technical Data
40
Freescale Semiconductor, Inc.
Use a high-frequency-response ceramic capacitor for C1. C2 is an
optional bulk current bypass capacitor for use in applications that require
the port pins to source high current levels.
Figure 1-5. Power Supply Bypassing
The OSC1 and OSC2 pins are the connections for the on-chip oscillator
circuit. See Section 7. Clock Generator Module
A logic 0 on the RST pin forces the MCU to a known startup state. RST
is bidirectional, allowing a reset of the entire system. It is driven low when
any internal reset source is asserted. This pin contains an internal pullup
resistor. See Section 19. System Integration Module
IRQ is an asynchronous external interrupt pin. This pin contains an
internal pullup resistor.
General Description
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MCU
V
DD
C1
0.1 µ F
+
C2
V
DD
NOTE: Component values shown
represent typical applications.
See Section 12. External Interrupt
MC68HC908GP32
V
SS
(CGMC).
(SIM).
(IRQ).
MC68HC08GP32 Rev. 6
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