PXR40RM Datasheet, PDF (1076/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Queued Analog-to-Digital Converter (EQADC)
Receive
Next
Data
Pointer
After reset or
invalidation
RFIFOx
Pop
Next
Data
Pointer
Valid Entry
Some entries received
but none popped
RFIFOx
First In
Pop
Next
Data
Pointer
No entries received
but some popped
RFIFOx
First In
Pop
Next
Data
Pointer
Empty Entry
Receive
Next
Data
Pointer
Last In
Receive
Next
Data
Pointer
Last In
Entries received until
full and none popped
RFIFOx
No entries received
but some popped
RFIFOx
Some entries received
and some popped
RFIFOx
Receive
Next
Data
Pointer
Last In
First In
Pop
Next
Data
Pointer
Receive
Next
Data
Pointer
Last In
First In
First In
Pop
Next
Data
Pointer
Receive
Next
Data
Pointer
Last In
Pop
Next
Data
Pointer
Figure 27-61. RFIFO Entry Pointer Example
NOTE: x=0, 1, 2, 3, 4, 5
27.7.5.2 Distributing Result Data into RFIFOs
Data to be moved into the RFIFOs can come from these sources: ADC0, ADC1, or the on-chip companion
module through the PSI. All result data comes with a MESSAGE_TAG field and a DEST field defining
27-94
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor