MC9S12T64 Datasheet, PDF (181/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Voltage Regulator
(VREG)
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Reset Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Overview
The voltage regulator (VREG) converts the external VDDR (5V±5%)
supply to VDD and VDDPLL (2.5V ± 10%) used to supply the internal
core logic as well as PLL and clock system.
Features
• Dual linear voltage regulator with nmos output transistors
• Standby mode to minimize power consumption
• Voltage reference derived from VDDA/VSSA
• Power on reset generator
Modes of Operation
The voltage regulator has three operating modes: run, standby and
disabled.
MOTOROLA
Voltage Regulator (VREG)
For More Information On This Product,
Go to: www.freescale.com
MC9S12T64Revision 1.1.1
181