Appendix A Electrical Characteristics
648
MC9S12C-Family / MC9S12GC-Family
Freescale Semiconductor
Rev 01.24
VDD1, VSS1, VDD2 and VSS2 are the supply pins for the digital 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 owing 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 owing into VDD1 and VDD2.
A.1.3
Pins
There are four groups of functional pins.
A.1.3.1
5V I/O Pins
Those I/O pins have a nominal level of 5V. This class of pins is comprised of all port I/O pins, the analog
inputs, BKGD pin, and the RESET inputs.The internal structure of all those pins is identical; however
some of the functionality may be disabled. For example, pull-up and pull-down resistors may be disabled
permanently.
A.1.3.2
Analog Reference
This class is made up by the two VRH and VRL pins. In 48- and 52-pin package versions the VRL pad is
bonded to the VSSA pin.
A.1.3.3
Oscillator
The pins XFC, EXTAL, XTAL dedicated to the oscillator have a nominal 2.5V level. They are supplied by
VDDPLL.
A.1.3.4
TEST
This pin is used for production testing only.
A.1.4
Current Injection
Power supply must maintain regulation within operating VDD5 or VDD range during instantaneous and
operating maximum current conditions. If positive injection current (Vin >VDD5) is greater than IDD5, the