Appendix A MCU Electrical Specifications
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
776
Freescale Semiconductor
Table A-1. Power Supplies
A.1.2
Pins
There are 4 groups of functional pins.
A.1.2.1
General Purpose I/O Pins (GPIO)
The I/O pins have a level in the range of 4.5V to 5.5V. This class of pins is comprised of all port I/O pins
(except PE0,1), BKGD and the RESET pins. Some functionality may be disabled.
A.1.2.2
High Voltage Pins
These consist of the LIN, VSENSE, VSUP and BCTL pins. These pins are intended to interface to external
components operating in the automotive battery range. They have nominal voltages above the standard 5V
I/O voltage range.
A.1.2.3
Main Oscillator
If the designated PE0 (EXTAL) and PE1 (XTAL) pins are configured for external oscillator operation then
these pins have a nominal voltage of 1.8V.
Mnemonic
Nominal Voltage
Description
VSS1
0V
Ground pin for 2.8V core supply voltage generated by on chip voltage regulator
VSS2
0V
Ground pin for 1.8V core supply voltage generated by on chip voltage regulator
LGND
0V
Ground pin for LINPHY
VDDX1
(1)
1. VDDX2 pin is internally connected to VDDX1 by metal
VDDA and VDDM1 are connected to VDDX pins by diodes for ESD
protection such that VDDX must not exceed VDDA and VDDM1,2 by
more than a diode voltage drop. VSSA, VSSM1 and VSSX are connected
by anti-parallel diodes for ESD protection.
5.0 V
5V power supply output for I/O drivers generated by on chip voltage regulator
VSSX1,2,3
0V
Ground pin for I/O drivers
VDDX2,3
5.0 V
5V power supply for I/O drivers which should be supply from external power transistor
VDDA
5.0 V
5V Power supply for the analog-to-digital converter and for the reference circuit of the
internal voltage regulator
VSSA
0V
Ground pin for VDDA analog supply
VDDM1
5.0 V
5V power supply for Port U I/O drivers which should be supply from external power
transistor
VSSM1
0V
Ground pin for Port U I/O drivers
VSUP
12V/18V
External power supply for voltage regulator