PXR40RM Datasheet, PDF (1065/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Queued Analog-to-Digital Converter (EQADC)
Table 27-38. CFIFO Scan Trigger Mode - Command Transfer Start/Stop Summary (continued)
Trigger Mode
Requires
Asserted SSS
to Recognize
Trigger
Events?
Command Transfer
Start/Restart
Condition
Stop on
asserted
EOQ
bit¹?
Stop on
asserted
Pause
bit²?
Other Command Transfer Stop
Condition^{3 4}
Continuous
Scan Level
No
Gate is opened.
No
No EQADC also stops transfers
from the CFIFO when CFIFO
status changes from
TRIGGERED due to the
detection of a closed gate.⁵
NOTES:
1 _{Refer to Section 27.7.4.7.2, CQueue Completion Status, for more information on EOQ.}
2 _{Refer to Section 27.7.4.7.3, Pause Status, for more information on Pause.}
3 _{EQADC always stops command transfers from a CFIFO when the CFIFO operation mode is disabled.}
4 _{EQADC always stops command transfers from a CFIFO when a higher priority CFIFO is triggered. Refer to}
Section 27.7.4.3, CFIFO Common Prioritization and Command Transfer, for information on CFIFO priority.
5 _{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.
27.7.4.7 CFIFO and Trigger Status
27.7.4.7.1 CFIFO Operation Status
Each CFIFO has its own CFIFO status field. CFIFO status (CFS) can be read from Section 27.6.2.10,
EQADC CFIFO Status Register (EQADC_CFSR). Figure 27-56 and Table 27-39 indicate the CFIFO
status switching condition. Refer to Figure 27-17 for the meaning of each CFIFO operation status. The last
CFIFO to transfer a command to an on-chip CBuffer can be read from the LCFTCBn (n=0,1) fields in the
Section 27.6.2.9, EQADC CFIFO Status Snapshot Registers (EQADC_CFSSR). The last CFIFO to
transfer a command to a specific external CBuffer can be identified by reading the LCFTSSI and ECBNI
fields in the Section 27.6.2.9, EQADC CFIFO Status Snapshot Registers (EQADC_CFSSR).
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
27-83