MC68HC908GT16_07 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GT16_07 Datasheet - Page 27

• Manufacturer Part Number: MC68HC908GT16_07
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1.5.2 Oscillator Pins (PTE4/OSC1 and PTE3/OSC2)
PTE4/OSC1 and PTE3/OSC2 are general-purpose, bidirectional I/O port pins. These pins can also be
programmed to be the connections for an external crystal, resonator or clock circuit. See
Internal Clock Generator (ICG)
1.5.3 External Reset Pin (RST)
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
1.5.4 External Interrupt Pin (IRQ)
IRQ is an asynchronous external interrupt pin. This pin contains an internal pullup resistor. See
Chapter 8 External Interrupt (IRQ).
1.5.5 ADC and ICG Power Supply Pins (V
V
generator (ICG). Connect the V
same voltage potential as V
Chapter 3 Analog-to-Digital Converter (ADC)
1.5.6 ADC Reference Pins (V
V
high reference supply for the ADC and should be filtered. V
potential as the analog supply pin, V
externally filtered. V
See
Freescale Semiconductor
DDA
REFH
Chapter 3 Analog-to-Digital Converter
and V
and V
SSA
REFL
are the power supply pins for the analog-to-digital converter (ADC) and the internal clock
are the reference voltage pins for the analog-to-digital converter (ADC). V
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
REFL
must be connected to the same voltage potential as the analog supply pin V
SS
Chapter 15 System Integration Module (SIM).
. Decoupling of these pins should be as per the digital supply. See
Module).
DDA
Note: Component values shown represent typical applications.
Figure 1-4. Power Supply Bypassing
REFH
pin to the same voltage potential as V
DDA
and V
V
. V
DD
V
REFL
(ADC).
DD
and
REFL
is the low reference supply for the ADC and should be
DDA
Chapter 7 Internal Clock Generator (ICG)
)
0.1 μF
+
MCU
and V
C1
C2
REFH
SSA
must be connected to the same voltage
)
V
SS
DD
, and the V
SSA
Chapter 7
Pin Functions
pin to the
REFH
Module).
is the
SSA
27
.