NXP Semiconductors MPC5566, Reference Manual

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Enhanced Queued Analog-to-Digital Converter (eQADC)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 19-17
19.3.2.5 eQADC Result FIFO Pop Registers 0–5 (EQADC_RFPR n )
The eQADC_RFPRs allow you to retrieve data from RFIFOs.
NOTE
Do not read the EQADC_RFPR n unless absolutely necessary, since the data
is lost when the read occurs. For compatibility, configure the TLB entry for
the EQADC_RFPR
n registers as guarded.
19.3.2.6 eQADC CFIFO Control Registers 0–5 (EQADC_CFCR n )
The eQADC_CFCRs contain bits that affect CFIFOs. These bits specify the CFIFO operation mode and
can invalidate all of the CFIFO contents.
Address: Base + 0x0030 (EQADC_RFPR0)
Base + 0x0034
(
EQADC_RFPR1)
Base + 0x0038 (EQADC_RFPR2)
Base + 0x003C (EQADC_RFPR3)
Base + 0x0040 (EQADC_RFPR4)
Base + 0x0044 (EQADC_RFPR5)
Access: RO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
Reset 0 0 0 0 0 0 0 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 RF_POP n
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 19-6. eQADC RFIFO Pop Registers 0–5 (EQADC_RFPR n )
Table 19-8. EQADC_RFPR n Field Descriptions
Field Description
0–15 Reserved.
16–31
RF_POP n
[0:15]
Result FIFO pop data n . When RFIFO n is not empty, the RF_POP n contains the next unread entry value of RFIFO n.
Reading the whole word, a halfword, or any bytes of EQADC_RFPR n pops one entry from RFIFO n , and the
RFCTR n value is decremented by 1. Refer to Section 19.3.2.8, “eQADC FIFO and Interrupt Status Registers 0–5
(EQADC_FISRn) .” When the RFIFO n is empty, any read on EQADC_RFPR n returns undefined data value and
does not decrement the RFCTR n value. Writing to EQADC_RFPR n has no effect.