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MC9S12DP256B Datasheet, PDF (67/126 Pages) Freescale Semiconductor, Inc – device made up of standard HCS12 blocks and the HCS12 processor core
Freescale SemiconMdCu9cS1t2oDrP,2I5n6BcD.evice User Guide — V02.15
Table 2-2 MC9S12DP256 Power and Ground Connection Summary
Pin Number
Mnemonic
112-pin QFP
Nominal
Voltage
Description
VDD1, 2
VSS1, 2
VDDR
VSSR
VDDX
VSSX
VDDA
VSSA
13, 65
14, 66
41
40
107
106
83
86
2.5 V
0V
5.0 V
0V
5.0 V
0V
5.0 V
0V
Internal power and ground generated by internal regulator
External power and ground, supply to pin drivers and internal
voltage regulator.
External power and ground, supply to pin drivers.
Operating voltage and ground for the analog-to-digital
converters and the reference for the internal voltage regulator,
allows the supply voltage to the A/D to be bypassed
independently.
VRL
85
VRH
84
VDDPLL
43
VSSPLL
45
0V
5.0 V
2.5 V
0V
Reference voltages for the analog-to-digital converter.
Provides operating voltage and ground for the Phased-Locked
Loop. This allows the supply voltage to the PLL to be
bypassed independently. Internal power and ground
generated by internal regulator.
VREGEN
97
5V Internal Voltage Regulator enable/disable
2.4.7 VREGEN — On Chip Voltage Regulator Enable
Enables the internal 5V to 2.5V voltage regulator. If this pin is tied low, VDD1,2 and VDDPLL must be
supplied externally.
69
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