MC9S12E256 Datasheet, PDF (560/602 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Appendix A Electrical Characteristics
A.1.2 Power Supply
The MC9S12E-Family utilizes several pins to supply power to the I/O ports, A/D converter, oscillator,
PLL and internal logic.
The VDDA, VSSA pair supplies the A/D converter and D/A converter.
The VDDX, VSSX pair supplies the I/O pins
The VDDR, VSSR pair supplies the internal voltage regulator.
VDD1, VSS1, VDD2 and VSS2 are the supply pins for the internal logic.
VDDPLL, VSSPLL supply the oscillator and the PLL.
VSS1 and VSS2 are internally connected by metal.
VDD1 and VDD2 are internally connected by metal.
VDDA, VDDX, VDDR as well as VSSA, VSSX, VSSR are connected by anti-parallel diodes for
ESD protection.
NOTE
In the following context VDD5 is used for either VDDA, VDDR and
VDDX; VSS5 is used for either VSSA, VSSR and VSSX unless otherwise
noted.
IDD5 denotes the sum of the currents flowing into the VDDA, VDDX and
VDDR pins.
VDD is used for VDD1, VDD2 and VDDPLL, VSS is used for VSS1, VSS2
and VSSPLL.
IDD is used for the sum of the currents flowing into VDD1 and VDD2.
MC9S12E256 Data Sheet, Rev. 1.08
560
Freescale Semiconductor