Maxim Integrated MAX32600, Руководство пользователя

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MAX32600 User’s Guide Analog Front End 8.3 ADC
8.3.4.1 Peripheral Clock Configuration
The MAX32600 supports multiple clock source options to operate the ADC.
To use the ADC, it is necessary to select the source for the ADC Peripheral Clock, select the clock divisor, and disable clock gating to generate the ADC Peripheral
Clock (PCLK).
Figure 8.7: ADC Peripheral Clock Configuration
Input Clock Source Selection
The input clock to the ADC can be selected from the system clock, PLL generated clock, external high-frequency clock, external crystal direct input, or internal
24MHz relaxation oscillator. Using the external 8MHz crystal input directly will provide the optimal clock source and highest accuracy with the ADC. If an external
8MHz crystal is not available, it is recommended to use the PLL 8MHz output. Lower sampling rate(s) and input frequency signal(s) are less susceptible to aperture
jitter; thus, the relaxation oscillator can be used as the clock source in these applications. To select the ADC input clock source, set the register
CLKMAN_CLK_CT
−
RL.adc_source_select as shown in the table below.
adc_source_select ADC Input Clock Source
00b System Clock
Rev.1.3 April 2015 Maxim Integrated Page 407