
56F827 Technical Data, Rev. 12
10
Freescale Semiconductor
2.2 Signals and Package Information
All inputs have a weak internal pull-up circuit associated with them. These pull-up circuits are always
enabled. Exceptions:
1. When a pin is owned by GPIO, then the pull-up may be disabled under software control.
2. TCK has a weak pull-down circuit always active.
Table 2-2 56F827 Signal and Package Information for the 128 Pin LQFP
Signal Name
Pin No.
Type
Description
V
DD
116
V
DD
Power
—These pins provide power to the internal structures of the chip, and
are generally connected to a 2.5V supply.
V
DD
81
V
DD
V
DD
19
V
DD
V
DDA
62
V
DDA
Analog Power
—This pin is a dedicated power pin for the analog portion of the
chip and should be connected to a low-noise 3.3V supply.
V
DDA_ADC
69
V
DDA
Analog Power
—This pin is a dedicated power pin for the analog portion of the
ADC module and should be connected to a low-noise 3.3V supply.
V
DDIO
113
V
DDIO
Power In/Out
—These pins provide power to the I/O structures of the chip, and
are generally connected to a 3.3V supply.
V
DDIO
82
V
DDIO
V
DDIO
56
V
DDIO
V
DDIO
29
V
DDIO
V
DDIO
4
V
DDIO
V
SS
115
V
SS
GND
—These pins provide grounding for the internal structures of the chip. All
should be attached to V
SS.
V
SS
80
V
SS
V
SS
20
V
SS
V
SSA
61
V
SSA
Analog Ground
—This pin supplies an analog ground.
V
SSA_ADC
63
V
SSA
Analog Ground
—This pin is a dedicated ground pin for the analog portion of
the ADC module.
V
SSIO
114
V
SSIO
GND In/Out
—These pins provide grounding for the I/O ring on the chip.
All should be attached to V
SS.
V
SSIO
83
V
SSIO
V
SSIO
58
V
SSIO
V
SSIO
30
V
SSIO
V
SSIO
5
V
SSIO
TCS
43
Input/Output
(Schmitt)
TCS
—This pin is reserved for factory use. It must be tied to V
SS
for normal
use. In block diagrams, this pin is considered an additional V
SS.