56F801 查看數據表（PDF） - Freescale Semiconductor
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56F801 Datasheet PDF : 48 Pages
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2.2 Power and Ground Signals
Table 2-2 Power Inputs
No. of Pins
4
1
Signal Name
Signal Description
VDD
VDDA
Power—These pins provide power to the internal structures of the chip, and should all be
attached to VDD.
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.
No. of Pins
4
1
1
Table 2-3 Grounds
Signal Name
Signal Description
VSS
VSSA
TCS
GND—These pins provide grounding for the internal structures of the chip, and should all
be attached to VSS.
Analog Ground—This pin supplies an analog ground.
TCS—This Schmitt pin is reserved for factory use and must be tied to VSS for normal use.
In block diagrams, this pin is considered an additional VSS.
Table 2-4 Supply Capacitors and VPP
No. of Signal Signal
State
Pins Name Type 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.
2.3 Clock and Phase Locked Loop Signals
Table 2-5 PLL and Clock
No. of Signal
Pins Name
1
EXTAL
Signal
State
Type During Reset
Signal Description
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.
GPIOB2 Input/
Output
Input
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.
56F801 Technical Data, Rev. 17
10
Freescale Semiconductor
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