Vregen - On Chip Voltage Regulator Enable - Motorola MC9S12DT256 User Manual

MC9S12DT256 Device User Guide — V03.07
Pin Number
Mnemonic
112-pin QFP
V 43
DDPLL
V 45
SSPLL
VREGEN 97
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.
68
Nominal
Voltage
2.5 V 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
0 V
generated by internal regulator.
5V Internal Voltage Regulator enable/disable
Description