Datasheet

56F801 Technical Data, Rev. 17
10 Freescale Semiconductor
2.2 Power and Ground Signals
2.3 Clock and Phase Locked Loop Signals
Table 2-2 Power Inputs
No. of Pins Signal Name Signal Description
4 V
DD
Power—These pins provide power to the internal structures of the chip, and should all be
attached to V
DD.
1 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.
Table 2-3 Grounds
No. of Pins Signal Name Signal Description
4 V
SS
GND—These pins provide grounding for the internal structures of the chip, and should all
be attached to V
SS.
1 V
SSA
Analog Ground—This pin supplies an analog ground.
1 TCS TCS—This Schmitt pin is reserved for factory use and must be tied to V
SS
for normal use.
In block diagrams, this pin is considered an additional V
SS.
Table 2-4 Supply Capacitors and VPP
No. of
Pins
Signal
Name
Signal
Type
State
During Reset
Signal Description
2 VCAPC Supply Supply VCAPC—Connect each pin to a 2.2 μFor greater bypass capacitor in order
to bypass the core logic voltage regulator (required for proper chip
operation). For more information, refer to Section 5.2.
Table 2-5 PLL and Clock
No. of
Pins
Signal
Name
Signal
Type
State
During Reset
Signal Description
1 EXTAL
GPIOB2
Input
Input/
Output
Input
Input
External Crystal Oscillator Input—This input should be connected to an
8MHz external crystal or ceramic resonator. For more information, please
refer to Section 3.5.
Port B GPIO—This multiplexed pin is a General Purpose I/O (GPIO) pin that
can be programmed as an input or output pin. This I/O can be utilized when
using the on-chip relaxation oscillator so the EXTAL pin is not needed.