s908gr32ag3vfa Freescale Semiconductor, Inc, s908gr32ag3vfa Datasheet - Page 26

• Manufacturer Part Number: s908gr32ag3vfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

General Description
1.5.2 Oscillator Pins (OSC1 and OSC2)
OSC1 and OSC2 are the connections for an external crystal, resonator, or clock circuit. See
Clock Generator Module
1.5.3 External Reset Pin (RST)
A low 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
8 External Interrupt (IRQ).
1.5.5 CGM Power Supply Pins (V
V
Decoupling of these pins should be as per the digital supply. See
(CGM).
1.5.6 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See
(CGM).
1.5.7 ADC Power Supply/Reference Pins (V
V
are the reference voltage pins for the ADC. V
the V
26
DDA
DDAD
DDAD
and V
and V
/V
SSA
REFH
SSAD
are the power supply pins for the analog portion of the clock generator module (CGM).
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
pin should be externally filtered and connected to the same voltage potential as V
are the power supply pins to the analog-to-digital converter (ADC). V
Chapter 14 System Integration Module (SIM).
(CGM).
Note: Component values shown represent typical applications.
Figure 1-5. Power Supply Bypassing
V
DD
DDA
V
DD
and V
REFH
is the high reference supply for the ADC, and by default
0.1 μF
+
SSA
MCU
DDAD
C1
C2
)
/V
REFH
and V
Chapter 4 Clock Generator Module
V
SS
Chapter 4 Clock Generator Module
SSAD
/V
REFL
Freescale Semiconductor
)
REFH
Chapter 4
and V
Chapter
REFL
DD
.