PXR40RM Datasheet, PDF (1070/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Queued Analog-to-Digital Converter (EQADC)
CQueue with a two
command sequences
CF5_CB1_CM0
CF5_CB1_CM1
CF5_CB1_CM2
CF5_CB1_CM3 (Pause =1)
CF5_CB1_CM4
CF5_CB1_CM5
CF5_CB1_CM6 (EOQ =1)
Example 1
CQueue with a three
command sequences
CF5_CB1_CM0
CF5_CB1_CM1
CF5_CB1_CM2
CF5_CB0_CM3
CF5_CB0_CM4
CF5_CB1_CM5
CF5_CB1_CM6 (EOQ =1)
Example 2
Assuming that these commands are transferred by a CFIFO configured for
edge trigger mode and the command transfers are never interrupted, the
EQADC would check for non-coherency of two command sequences: one
formed by commands 0, 1, 2, 3, and the other by commands 4, 5, 6.
Assuming that command transfers from the CFIFO are never interrupted,
the EQADC would check for non-coherency of three command sequences.
The first being formed by commands 0, 1, 2, the second by commands 3,
4 and the third by commands 5, 6. Note that even when the commands of
this CQueue are transferred through a CFIFO in continuous-scan mode,
the first three commands and the last two commands of this CQueue would
still constitute two distinct command sequences, although they are all
bound for the same CBuffer, since an asserted EOQ ends a command
sequence.
CQueue with a seven
command sequences
CF5_CB1_CM0
CF5_CB2_CM1
CF5_CB3_CM2
CF5_CB1_CM3
CF5_CB0_CM4
CF5_CB2_CM5
CF5_CB1_CM6 (EOQ =1)
Example 3
The EQADC would check for non-coherency of seven command
sequences, all containing a single command, but NCF would never get set.
CFx_CBa_CMn - Command n in CFIFOx bound for CBuffera
Figure 27-57. Command Sequence Examples
The NCF flag is used to indicate command sequence non-coherency. When the NCFx flag is asserted, it
indicates that the command sequence being transferred through CFIFOx became non-coherent. The NCF
flag only becomes asserted for CFIFOs in TRIGGERED state.
A command sequence is non-coherent when, after transferring the first command of a sequence from a
CFIFO to a CBuffer, it cannot successively send all the other commands of the sequence before any of the
following conditions are true:
27-88
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor