Enhanced Queued Analog-to-Digital Converter (eQADC)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
31-17
Preliminary
31.3.3.8
eQADC FIFO and Interrupt Status Registers 0–5 (EQADC_FISRn)
The EQADC_FISRs contain flag and status bits for each CFIFO and RFIFO pair. Writing 1 to a flag bit
clears it. Writing 0 has no effect. Status bits are read only. These bits indicate the status of the FIFO itself.
RFDEn
RFIFO Drain Enable n. Enables the eQADC to generate an interrupt request (RFDSn is asserted) or eDMA
request (RFDSn is negated) when RFDFn in EQADC_FISRn (See
Section 31.3.3.8, “eQADC FIFO and Interrupt
Status Registers 0–5 (EQADC_FISRn)
”
)
is asserted.
0 Disable RFIFO drain eDMA or interrupt request
1 Enable RFIFO drain eDMA or interrupt request
Note: RFDEn must not be negated while an eDMA transaction is in progress.
RFDSn
RFIFO Drain Select n. Selects if an eDMA or interrupt request is generated when RFDFn in EQADC_FISRn (See
Section 31.3.3.8, “eQADC FIFO and Interrupt Status Registers 0–5 (EQADC_FISRn)
”)
is asserted. If RFDEn is
asserted, the eQADC generates an interrupt request when RFDSn is negated, or it generates an eDMA request
when RFDSn is asserted.
0 Generate interrupt request to move data from RFIFn to the system memory
1 Generate eDMA request to move data from RFIFOn to the system memory
Note: DMA access is not supported on CFIFO 2 to 5. These FIFOs can be filled only by interrupt requests.
Note: RFDSn must not be negated while an eDMA transaction is in progress.
Offset: Base + 0x0070 (EQADC_FISR0)
Base + 0x0074 (EQADC_FISR1)
Base + 0x0078 (EQADC_FISR2)
Base + 0x007C (EQADC_FISR3)
Base + 0x0080 (EQADC_FISR4)
Base + 0x0084 (EQADC_FISR5)
Access: Read/Write to clear
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R NCFn TORFn
PFn
EOQFn CFUFn SSSn CFFFn
0
0
0
0
0
RFOFn
0
RFDFn
0
W
w1c
w1c
w1c
w1c
w1c
w1c
w1c
w1c
Reset
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
CFCTRn
TNXTPTRn
RFCTRn
POPNXTPTRn
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 31-9. eQADC FIFO and Interrupt Status Registers 0–5 (EQADC_FISRn)
Table 31-10. EQADC_IDCRn Field Descriptions (continued)
Field
Description