mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 46

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Device Overview S12XS Family
1.2.4.3
The voltage supply of nominally 1.8 V is derived from the internal voltage regulator. The return current
path is through the VSS2 and VSS3 pins. No static external loading of these pins is permitted.
1.2.4.4
The voltage supply of nominally 2.8 V is derived from the internal voltage regulator. The return current
path is through the VSS1 pin. No static external loading of these pins is permitted.
1.2.4.5
These are the power supply and ground input pins for the analog-to-digital converters and the voltage
regulator.
1.2.4.6
V
1.2.4.7
These pins provide operating voltage and ground for the oscillator and the phased-locked loop. The voltage
supply of nominally 1.8 V 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.
46
RH
and V
RL
VDD, VSS2, VSS3 — Core Power Pins
VDDF, VSS1 — NVM Power Pins
VDDA, VSSA — Power Supply Pins for ATD and Voltage Regulator
VRH, VRL — ATD Reference Voltage Input Pins
VDDPLL, VSSPLL — Power Supply Pins for PLL
are the reference voltage input pins for the analog-to-digital converter.
VSS1, VSS2,
Mnemonic
VDDX[2:1]
VSSX[2:1]
VDDR
VDDA
VSSA
VDDF
VSS3
VRH
VDD
VRL
Table 1-7. Power and Ground Connection Summary
S12XS Family Reference Manual, Rev. 1.10
Nominal
Voltage
5.0 V
5.0 V
5.0 V
5.0 V
1.8 V
2.8 V
0 V
0 V
0 V
0 V
External power 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 voltages for the analog-to-digital
converter.
Internal power and ground generated by
internal regulator for the internal core.
Internal power and ground generated by
internal regulator for the internal NVM.
Description
Freescale Semiconductor