Datasheet

Appendix A Electrical Characteristics
648 MC9S12C-Family / MC9S12GC-Family Freescale Semiconductor
Rev 01.24
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