MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
19-74
Freescale Semiconductor
NOTE
An asserted EOQF
n
only implies that the eQADC has finished transferring
a command with an asserted EOQ bit from CFIFO
n
. It does not imply that
result data for the current command and for all previously transferred
commands has been returned to the appropriate RFIFO.
19.4.3.6.3
Pause Status
In edge trigger mode, when the eQADC completes the transfer of a CFIFO entry with an asserted pause
bit, the eQADC will stop future command transfers from the CFIFO and set EQADC_FISRn[PF] (see
Section 19.3.2.8). Refer to
Section 19.4.1.2, “Message Format in eQADC
,” for information on command
message formats. The eQADC ignores the pause bit in command messages in any software level trigger
mode. The eQADC sets the PF flag upon detection of an asserted pause bit only in single or
continuous-scan edge trigger mode. When the PF flag is set for a CFIFO in single-scan edge trigger mode,
the EQADC_FISRn[SSS] bit will not be cleared (see Section 19.3.2.8).
In level trigger mode, the definition of the PF flag has been redefined. In level trigger mode, when CFIFO
n
is in TRIGGERED status, PF
n
is set when the CFIFO status changes from TRIGGERED due to detection
of a closed gate. The pause flag interrupt routine can be used to verify if the a complete scan of the
command queue was performed. If a closed gate is detected while no command transfers are taking place,
it will have immediate effect on the CFIFO status. If a closed gate is detected during the serial transmission
of a command to the external device, it will have no effect on the CFIFO status until the transmission
completes.
When EQADC_CFCR[PIE] (see Section 19.3.2.6) and EQADC_FISRn[PF] are asserted, the eQADC will
generate a pause interrupt request.
NOTE
In edge trigger mode, an asserted PF
n
only implies that the eQADC finished
transferring a command with an asserted pause bit from CFIFO
n
. It does not
imply that result data for the current command and for all previously
transferred commands has been returned to the appropriate RFIFO.
NOTE
In software or level trigger mode, when the eQADC completes the transfer
of an entry from CFIFO
n
with an asserted pause bit, PF
n
will not be set and
command transfers will continues without pausing.
19.4.3.6.4
Trigger Overrun Status
When a CFIFO is configured for edge- or level-trigger mode and is in a TRIGGERED state, an additional
trigger occurring for the same CFIFO results in a trigger overrun. The trigger overrun bit for the
corresponding CFIFO will be set (EQADC_FISRn[TORF
n
] = 1, see Section 19.3.2.8). When
EQADC_CFCRn[TORIE] (see Section 19.3.2.6) and EQADC_FISRn[TORF] are asserted, the eQADC
generates a trigger overrun interrupt request.
For CFIFOs configured for level-trigger mode, a trigger overrun event is only detected when the gate
closes and reopens during a single serial command transmission as shown in
.
Summary of Contents for MPC5553
Page 5: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 2 Freescale Semiconductor...
Page 21: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 xvi Freescale Semiconductor...
Page 47: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 1 26 Freescale Semiconductor...
Page 163: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 4 20 Freescale Semiconductor...
Page 179: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 5 16 Freescale Semiconductor...
Page 561: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 13 38 Freescale Semiconductor...
Page 615: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 14 54 Freescale Semiconductor...
Page 707: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 17 68 Freescale Semiconductor...
Page 755: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 18 48 Freescale Semiconductor...
Page 873: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 19 118 Freescale Semiconductor...
Page 984: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 Freescale Semiconductor 21 41...
Page 985: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 21 42 Freescale Semiconductor...
Page 1019: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 22 34 Freescale Semiconductor...
Page 1129: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 25 90 Freescale Semiconductor...