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6 bits
TRM
SC[VREFEN]
2 bits
SC[MODE_LV]
Regulation
Buffer
BANDGAP
100 nF
VREF_OUT
Dedicated
SC[VREFST]
1.75 V Regulator
1.75 V
VDDA
VSSA
1.2V
VDDA
2.1V
Buffer Select
6 bits
Feedback Trim
Output pin
VREF
Figure 53-1. Voltage reference block diagram
53.1.1 Overview
The Voltage Reference provides a buffered reference voltage for use as an external
reference, which can be set to either 1.2V or 2.1V. In addition, the buffered reference is
available internally for use with on-chip peripherals (such as ADCs and DACs). Refer to
the chip configuration details. When the VREF is enabled, the reference voltage is placed
on a dedicated output pin.
• In 1.2V mode, the Voltage Reference output can be trimmed with 0.5mV resolution,
using the TRM register TRIM[5:0] bitfield.
• In 2.1V mode, the Voltage Reference output can be trimmed with 1.5mV resolution,
using the TRM register VREF_TRM4 TRIM2V1[5:0] bitfield.
Introduction
K32 L2A Reference Manual, Rev. 2, 01/2020
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NXP Semiconductors
Содержание K32 L2A Series
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