Adc Status And Control Registers 1 (Adcx_Sc1N) - NXP Semiconductors MKL27Z128VFM4 Reference Manual

Table of Contents

Chapter 23 Analog-to-Digital Converter (ADC)

23.4.1 ADC Status and Control Registers 1 (ADCx_SC1n)

SC1A is used for both software and hardware trigger modes of operation.

To allow sequential conversions of the ADC to be triggered by internal peripherals, the

ADC can have more than one status and control register: one for each conversion. The

SC1B–SC1n registers indicate potentially multiple SC1 registers for use only in hardware

trigger mode. See the chip configuration information about the number of SC1n registers

specific to this device. The SC1n registers have identical fields, and are used in a "ping-

pong" approach to control ADC operation.

At any one point in time, only one of the SC1n registers is actively controlling ADC

conversions. Updating SC1A while SC1n is actively controlling a conversion is allowed,

and vice-versa for any of the SC1n registers specific to this MCU.

Writing SC1A while SC1A is actively controlling a conversion aborts the current

conversion. In Software Trigger mode, when SC2[ADTRG]=0, writes to SC1A

subsequently initiate a new conversion, if SC1[ADCH] contains a value other than all 1s

(module disabled).

Writing any of the SC1n registers while that specific SC1n register is actively controlling

a conversion aborts the current conversion. None of the SC1B-SC1n registers are used for

software trigger operation and therefore writes to the SC1B–SC1n registers do not initiate

a new conversion.

Address: 4003_B000h base + 0h offset + (4d × i), where i=0d to 1d

KL27 Sub-Family Reference Manual , Rev. 5, 01/2016

Freescale Semiconductor, Inc.