Analog-to-Digital Converter (ADC)
MPC5606S Microcontroller Reference Manual, Rev. 7
144 Freescale Semiconductor
5
EDGE
Start trigger edge/ level detection. The following table shows the interaction between the EDGE bit
and the TRGEN and EDGLEV bits.
6 Reserved
Must be kept at 0.
7
NSTART
Normal Start conversion
Setting this bit starts the chain or scan conversion. Resetting this bit during scan mode causes the
current chain conversion to finish, then stops the operation.
This bit stays high while the conversion is ongoing (or pending during injection mode).
0 Causes the current chain conversion to finish and stops the operation.
1 Starts the chain or scan conversion.
8 Reserved
A write of any value has no effect. The read value is always 0.
9
JTRGEN
Injection external trigger enable
0 External trigger disabled for channel injection (injected conversion cannot be started using an
external signal).
1 External trigger enabled for channel injection.
10
JEDGE
Injection trigger edge selection
Edge selection for external trigger, if JTRGEN = 1.
0 Selects falling edge for the external trigger.
1 Selects rising edge for the external trigger.
11
JSTART
Injection start
Setting this bit will start the configured injected analog channels to be converted by software.
Resetting this bit has no effect, as the injected chain conversion cannot be interrupted.
12–13 Reserved
A write of any value has no effect. The read value is always 0.
14 Reserved
Must be kept at 0.
15–22 Reserved
A write of any value has no effect. The read value is always 0.
23
ADCLKSEL
Analog clock frequency selector
If this bit is set the AD_clk frequency is equal to ipg_clk frequency. Otherwise, it is half of ipg_clk
frequency. This bit can be written in power-down only.
Table 5-7. MCR field descriptions (continued)
Field Description
TRGEN EDGLEV EDGE Trigger Detection
0 nnExternal triggering disabled
1 0 0 External trigger on falling edge of trigger
1 0 1 External trigger on rising edge of trigger
1 1 0 External trigger on low edge of trigger
1 1 1 External trigger on high edge of trigger
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