PXD10RM Datasheet, PDF (247/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 9-14. EMIOSC[n] Field Descriptions (continued)
Field
Description
bit 24
EDPOL
Edge Polarity bit
For input modes (except QDEC mode), the EDPOL bit asserts which edge triggers either the internal
counter or an input capture or a FLAG. When not shown in the mode of operation description, this bit
has no effect.
1 = Trigger on a rising edge
0 = Trigger on a falling edge
For QDEC (MODE[6] cleared), the EDPOL bit selects the count direction according to direction signal
(UC[n] input).
1 = counts up when UC[n] is asserted
0 = counts down when UC[n] is asserted
Note: UC[n-1] EDPOL bit selects which edge clocks the internal counter of UC[n]
1 = Trigger on a rising edge
0 = Trigger on a falling edge
For QDEC (MODE[6] set), the EDPOL bit selects the count direction according to the phase
difference.
1 = internal counter increments if phase_A is ahead phase_B signal
0 = internal counter decrements if phase_A is ahead phase_B signal
Note: In order to operate properly, EDPOL bit must contain the same value in UC[n] and UC[n-1]
For output modes, the EDPOL bit is used to select the logic level on the output pin.
1 = A match on comparator A sets the output flip-flop, while a match on comparator B clears it
0 = A match on comparator A clears the output flip-flop, while a match on comparator B sets it
bit 25:31 Mode selection bits
MODE[0:6] The MODE[0:6] bits select the mode of operation of the Unified Channel, as shown in Table 9-19.
Note: If a reserved value is written to mode the results are unpredictable.
ODISSL[0:1]
00
01
10
11
Table 9-15. UC ODISSL selection
eMIOS200_0 channel
emios_flag_out[8]
emios_flag_out[9]
emios_flag_out[10]
emios_flag_out[11]
eMIOS200_1 channel
emios_flag_out[16]
emios_flag_out[17]
emios_flag_out[18]
emios_flag_out[19]
input signal
Output Disable Input 0
Output Disable Input 1
Output Disable Input 2
Output Disable Input 3
Table 9-16. UC Internal Prescaler Clock Divider
UCPRE[0:1]
Divide ratio
00
1
01
2
10
3
11
4
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
9-21