S12ATD10B8CV2 MOTOROLA [Motorola, Inc], S12ATD10B8CV2 Datasheet - Page 73
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S12ATD10B8CV2
Manufacturer Part Number
S12ATD10B8CV2
Description
MC9S12DT128 Device User Guide V02.09
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.S12ATD10B8CV2.pdf
(138 pages)
- Current page: 73 of 138
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2.4.1 VDDX,VSSX — Power & Ground Pins for I/O Drivers
External power and ground for I/O drivers. Because fast signal transitions place high, short-duration
current demands on the power supply, use bypass capacitors with high-frequency characteristics and place
them as close to the MCU as possible. Bypass requirements depend on how heavily the MCU pins are
loaded.
2.4.2 VDDR, VSSR — Power & Ground Pins for I/O Drivers & for Internal
Voltage Regulator
transitions place high, short-duration current demands on the power supply, use bypass capacitors with
high-frequency characteristics and place them as close to the MCU as possible. Bypass requirements
depend on how heavily the MCU pins are loaded.
2.4.3 VDD1, VDD2, VSS1, VSS2 — Internal Logic Power Supply Pins
Power is supplied to the MCU through VDD and VSS. Because fast signal transitions place high,
short-duration current demands on the power supply, use bypass capacitors with high-frequency
characteristics and place them as close to the MCU as possible. This 2.5V supply is derived from the
internal voltage regulator. There is no static load on those pins allowed. The internal voltage regulator is
turned off, if VREGEN is tied to ground.
External power and ground for I/O drivers and input to the internal voltage regulator. Because fast signal
NOTE:
NOTE:
Mnemonic
VREGEN
VDDPLL
VSSPLL
VDDR
VSSR
VDDX
VDDA
VSSX
VSSA
VRH
VRL
All VSS pins must be connected together in the application.
No load allowed except for bypass capacitors.
112-pin QFP
Pin Number
107
106
41
40
83
86
85
84
43
45
97
Nominal
Voltage
5.0V
5.0V
5.0V
5.0V
2.5V
0V
0V
0V
0V
0V
5V
External power and ground, supply to pin drivers and internal
External power and ground, supply to pin drivers.
Operating voltage and ground for the analog-to-digital
Reference voltages for the analog-to-digital converter.
Provides operating voltage and ground for the Phased-Locked
Internal Voltage Regulator enable/disable
voltage regulator.
converters and the reference for the internal voltage regulator,
allows the supply voltage to the A/D to be bypassed
independently.
Loop. This allows the supply voltage to the PLL to be
bypassed independently. Internal power and ground
generated by internal regulator.
MC9S12DT128 Device User Guide — V02.09
Description
73
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