NXP Semiconductors KL25 Series - 3.2.2 Analog reference options; 3.3 Core Modules; 3.3.1 ARM Cortex-M0+ Core Configuration

3.2.2 Analog reference options
Several analog blocks have selectable reference voltages as shown in the below table.
These options allow analog peripherals to share or have separate analog references. Care
should be taken when selecting analog references to avoid cross talk noise.
Table 3-2. Analog reference options
Module Reference option Comment/ Reference selection
16-bit SAR ADC 1 - VREFH
2 - VDDA
3 - Reserved
Selected by ADCx_SC2[REFSEL] bits
12-bit DAC 1 - VREFH
2 - VDDA
1
Selected by DACx_C0[DACRFS] bit
CMP with 6-bit DAC Vin1 - VREFH
Vin2 - VDD
1
Selected by CMPx_DACCR[VRSEL] bit
1. Use this option for the best ADC operation.
Core Modules
3.3.1 ARM Cortex-M0+ Core Configuration
This section summarizes how the module has been configured in the chip. Full
documentation for this module is provided by ARM and can be found at www.arm.com.
3.3
Core Modules
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
48 Freescale Semiconductor, Inc.