MC9S12C128V1 Datasheet, PDF (648/690 Pages) Freescale Semiconductor, Inc – MC9S12C Family MC9S12GC Family Reference Manual

Appendix A Electrical Characteristics
V_DD1, V_SS1, V_DD2 and V_SS2 are the supply pins for the digital logic.
V_DDPLL, V_SSPLL supply the oscillator and the PLL.
V_SS1 and V_SS2 are internally connected by metal.
V_DD1 and V_DD2 are internally connected by metal.
V_DDA, V_DDX, V_DDR as well as V_SSA, V_SSX, V_SSR are connected by anti-parallel diodes for ESD
protection.
NOTE
In the following context VDD5 is used for either V_DDA, V_DDR, and V_DDX;
V_SS5 is used for either V_SSA, V_SSR, and V_SSX unless otherwise noted.
IDD5 denotes the sum of the currents flowing into the V_DDA, V_DDX, and
V_DDR pins.
V_DD is used for V_DD1, V_DD2, and V_DDPLL, V_SS is used for V_SS1, V_SS2, and
V_SSPLL.
I_DD is used for the sum of the currents flowing into V_DD1 and V_DD2.
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 V_RH and V_RL pins. In 48- and 52-pin package versions the V_RL pad is
bonded to the V_SSA 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
V_DDPLL.
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 V_DD5 or V_DD range during instantaneous and
operating maximum current conditions. If positive injection current (V_in > V_DD5) is greater than I_DD5, the
648
MC9S12C-Family / MC9S12GC-Family
Freescale Semiconductor
Rev 01.24