NXP Semiconductors MC9S12G - Page 50

Device Overview MC9S12G-Family
MC9S12G Family Reference Manual Rev.1.27
52 NXP Semiconductors
1.7.3.6 Power and Ground Connection Summary
Table 1-7. Power and Ground Connection Summary
Mnemonic Nominal Voltage Description
VDDR 3.15V – 5.0 V External power supply for internal voltage regulator.
VSS 0V Return ground for the logic supply generated by the internal regulator
VDDX
[3:1]
3.15V – 5.0 V External power supply for I/O drivers. The 100-pin package features 3 I/O supply pins.
VSSX
[3:1]
0V Return ground for I/O drivers. The100-pin package provides 3 ground pins
VDDX 3.15V – 5.0 V External power supply for I/O drivers, All packages except 100-pin feature 1 I/O supply.
VSSX 0V Return ground for I/O drivers. All packages except 100-pin provide 1 I/O ground pin.
VDDA 3.15V – 5.0 V External power supply for the analog-to-digital converter and for the reference circuit of the
internal voltage regulator.
VSSA 0V Return ground for VDDA analog supply
VDDXR 3.15V – 5.0 V External power supply for I/O drivers and internal voltage regulator. For the 48-pin package
the VDDX and VDDR supplies are combined on one pin.
VDDXRA 3.15V – 5.0 V External power supply for I/O drivers, internal voltage regulator and analog-to-digital
converter. For the 20- and 32-pin package the VDDX, VDDR and VDDA supplies are
combined on one pin.
VSSXA 0V Return ground for I/O driver and VDDA analog supply
VRH 3.15V – 5.0 V Reference voltage for the analog-to-digital converter.