MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 56

• Manufacturer Part Number: MC9S12Q
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 1 MC9S12Q Device Overview (MC9S12Q128-Family)
1.3.5.4
V
to digital converter.
1.3.5.5
V
1.3.5.6
Provides operating voltage and ground for the oscillator and the phased-locked loop. This allows the
supply voltage to the oscillator and PLL to be bypassed independently. This 2.5V voltage is generated by
the internal voltage regulator.
56
Mnemonic
V
DDA
RH
V
DD1, VDD2
SS1, VSS2
V
V
V
V
V
V
V
V
V
DDPLL
SSPLL
V
and V
DDR
SSR
DDX
SSX
DDA
SSA
RH
RL
, V
SSA
RL
are the power supply and ground input pins for the voltage regulator reference and the analog
V
V
V
Voltage (V)
are the reference voltage input pins for the analog to digital converter.
Nominal
All V
signal transitions place high, short-duration current demands on the power
supply, use bypass capacitors with high-frequency characteristics and place
them as close to the MCU as possible. Bypass requirements depend on
MCU pin load.
DDA
RH
DDPLL
2.5
5.0
5.0
5.0
5.0
2.5
0
0
0
0
0
0
, V
, V
SS
RL
, V
SSA
pins must be connected together in the application. Because fast
Internal power and ground generated by internal regulator. These also allow an external source
to supply the core V
In the 48 and 52 LQFP packages V
External power and ground, supply to internal voltage regulator.
External power and ground, supply to pin drivers.
Operating voltage and ground for the analog-to-digital converters and the reference for the
internal voltage regulator, allows the supply voltage to the A/D to be bypassed independently.
Reference voltage low for the ATD converter.
In the 48 and 52 LQFP packages V
Provides operating voltage and ground for the phased-locked loop. This allows the supply voltage
to the PLL to be bypassed independently. Internal power and ground generated by internal
regulator.
— ATD Reference Voltage Input Pins
SSPLL
Table 1-6. Power and Ground Connection Summary
— Power Supply Pins for ATD and VREG
— Power Supply Pins for PLL
DD
/V
SS
MC9S12Q128
voltages and bypass the internal voltage regulator.
Rev 1.09
NOTE
DD2
RL
is bonded to V
and V
Description
SS2
are not available.
SSA
.
Freescale Semiconductor