Chapter 1 Device Overview MC9S12XE-Family
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
73
1.2.4.4
VDDF — NVM Power Pin
Power is supplied to the MCU NVM through VDDF . The voltage supply of nominally 2.8V is derived
from the internal voltage regulator. No static external loading of these pins is permitted.
1.2.4.5
VDDA2, VDDA1, VSSA2
,
VSSA1 — Power Supply Pins for ATD and
Voltage Regulator
These are the power supply and ground input pins for the analog-to-digital converters and the voltage
regulator. Internally the V
DDA
pins are connected together. Internally the V
SSA
pins are connected
together.
1.2.4.6
VRH, VRL — ATD Reference Voltage Input Pins
V
RH
and V
RL
are the reference voltage input pins for the analog-to-digital converter.
1.2.4.7
VDDPLL, VSSPL — Power Supply Pins for PLL
These pins provide operating voltage and ground for the oscillator and the phased-locked loop. The voltage
supply of nominally 1.8V is derived from the internal voltage regulator. This allows the supply voltage to
the oscillator and PLL to be bypassed independently. This voltage is generated by the internal voltage
regulator. No static external loading of these pins is permitted.
Table 1-11. Power and Ground Connection Summary
Mnemonic
Nominal
Voltage
Description
VDDR
5.0 V
External power supply to internal voltage
regulator
VDDX[7:1]
5.0 V
External power and ground, supply to pin
drivers
VSSX[7:1]
0 V
VDDA2
,
VDDA1
5.0 V
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.
VSSA2
,
VSSA1
0 V
VRL
0 V
Reference voltages for the analog-to-digital
converter.
VRH
5.0 V
VDD
1.8 V
Internal power and ground generated by
internal regulator for the internal core.
VSS1, VSS2,
VSS3
0V
VDDF
2.8 V
Internal power and ground generated by
internal regulator for the internal NVM.
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages