mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1240

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Appendix A Electrical Characteristics
A.1.3
There are four groups of functional pins.
A.1.3.1
Those I/O pins have a nominal level in the range of 3.15 V to 5.5 V. This class of pins is comprised of all
port I/O pins, the analog inputs, BKGD and the RESET pins.The internal structure of all those pins is
identical; however, some of the functionality may be disabled. For example, for the analog inputs the
output drivers, pull-up and pull-down resistors are disabled permanently.
A.1.3.2
This group is made up by the V
A.1.3.3
The pins XFC, EXTAL, XTAL dedicated to the oscillator have a nominal 2.5 V level. They are supplied
by V
A.1.3.4
This pin is used for production testing only.
A.1.3.5
This pin is used to enable the on-chip voltage regulator.
A.1.4
Power supply must maintain regulation within operating V
operating maximum current conditions. If positive injection current (V
the injection current may flow out of V
regulation. Ensure external V
will be the greatest risk when the MCU is not consuming power; e.g., if no system clock is present, or if
clock rate is very low which would reduce overall power consumption.
1240
DDPLL
.
Pins
Current Injection
I/O Pins
Analog Reference
Oscillator
TEST
VREGEN
In the following context V
V
I
V
V
V
I
DD35
DD
SS35
DDR
DD
SSPLL
is used for the sum of the currents flowing into V
is used for V
denotes the sum of the currents flowing into the V
is used for either V
pins.
.
DD35
RH
DD1
load will shunt current greater than maximum injection current. This
and V
MC9S12XDP512 Data Sheet, Rev. 2.17
, V
DD35
DD2
SSA
RL
DD35
pins.
, V
and V
and could result in external power supply going out of
is used for either V
SSR
NOTE
DDPLL
and V
, V
SSX
DD35
SS
unless otherwise noted.
is used for V
or V
DDA
DD1
DD
, V
in
DDA
range during instantaneous and
> V
and V
DDR
, V
SS1
DD35
, and V
DDX
DD2
, V
) is greater than I
SS2
.
and
Freescale Semiconductor
DDX
and
;
DD35
,