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P912XDP512F0MPVR 数据表(PDF) 564 Page - Freescale Semiconductor, Inc

部件名 P912XDP512F0MPVR
功能描述  HCS12X Microcontrollers
PDF  1348 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

P912XDP512F0MPVR 数据表(HTML) 564 Page - Freescale Semiconductor, Inc

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Chapter 14 Voltage Regulator (S12VREG3V3V5)
MC9S12XDP512 Data Sheet, Rev. 2.21
564
Freescale Semiconductor
14.3.2.6
Reserved 06
The Reserved 06 is reserved for test purposes.
14.3.2.7
Reserved 07
The Reserved 07 is reserved for test purposes.
14.4
Functional Description
14.4.1
General
Module VREG_3V3 is a voltage regulator, as depicted in Figure 14-1. The regulator functional elements
are the regulator core (REG), a low-voltage detect module (LVD), a control block (CTRL), a power-on
reset module (POR), and a low-voltage reset module (LVR).
14.4.2
Regulator Core (REG)
Respectively its regulator core has two parallel, independent regulation loops (REG1 and REG2) that differ
only in the amount of current that can be delivered.
The regulator is a linear regulator with a bandgap reference when operated in Full Performance Mode. It
acts as a voltage clamp in Reduced Power Mode. All load currents flow from input VDDR to VSS or
VSSPLL. The reference circuits are supplied by VDDA and VSSA.
14.4.2.1
Full Performance Mode
In Full Performance Mode, the output voltage is compared with a reference voltage by an operational
amplifier. The amplified input voltage difference drives the gate of an output transistor.
76543210
R
00000000
W
Reset
00000000
= Unimplemented or Reserved
Figure 14-8. Reserved 06
76543210
R
00000000
W
Reset
00000000
= Unimplemented or Reserved
Figure 14-9. Reserved 07



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