PXD10RM Datasheet, PDF (138/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 5-7. Main Configuration Register (MCR) field descriptions (continued)
Bit
Description
5
Start trigger edge/ level detection. The following table shows the interaction between the EDGE bit and
the TRGEN and EDGLEV bits.
TRGEN EDGLEV EDGE
Trigger Detection
0
n
n
External 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
6
7
8
9
10
11
12:13
14
15:22
23
Reserved
Must be kept at 0.
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
Reserved
Write of any value has no effect, read value is always 0.
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
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
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.
Reserved
Write of any value has no effect, read value is always 0.
Reserved
Must be kept at 0.
Reserved
Write of any value has no effect, read value is always 0.
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.
5-16
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor