Confused About SARADC Configuration Options in SPC58ECxx RLA,

[ASH2930T]

Hi everyone,

I’m working on configuring the SARADC in the SPC58ECxx using the RLA (Low-Level Drivers) tool. I want to read an analog signal on PE0 / ADC-AN11.

In the SARADC settings, I see the following options:

• SARADC B

• SARADC 0

• SARADC 1

• SARADC 3

• SARADC 10bit modules

• SARADC STANDBY

I’m a bit confused about which options I actually need to select. I understand that SARADC0 is the module connected to my pin, but I’m not entirely clear on the purpose of SARADC B and the other options.

Could someone clarify:

1. What each of these options actually does.

2. Which options I need to select if I only want to read PE0 / AN11 with SARADC0.

   

    

[darenluie]

For reading PE0 / ADC-AN11, you only need to enable SARADC0 and the 10-bit resolution module. SARADC B and STANDBY options are for internal calibration and low-power modes, so they aren’t required for a basic single-channel read. Make sure your channel mapping in the RLA matches AN11 to SARADC0.

[Giuseppe DI-GIORE]

SARADC_B is the Supervisor SARADC able to read all analog channels. It is mainly used by safety task (redundancy).

Typical usage is:

1. select a channel, read it SARADC_[0,1,2, ...]
2. at the same time read the same channel using SARADC_B
3. compare the two values