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548
11100B–ATARM–31-Jul-12
SAM4S Series [Preliminary]
PIO_PCRHR and it is not read before a new data is stored in PIO_PCRHR, then an overrun
error occurs. The previous data is lost and the OVRE flag in PIO_PCISR is set to 1. This flag is
automatically reset when PIO_PCISR is read (reset after read).
The flags DRDY, OVRE, ENDRX and RXBUFF can be a source of the PIO interrupt.
Figure 29-10. Parallel Capture Mode Waveforms (DSIZE = 2, ALWYS = 0, HALFS = 0)
Figure 29-11. Parallel Capture Mode Waveforms (DSIZE=2, ALWYS=1, HALFS=0)
0x23
0x34
0x45
0x12
0x56
0x67
0x7
8
0x
8
9
0x5645_3423
MCK
PIODCCLK
PIODC[7:0]
PIODCEN1
PIODCEN2
DRDY (PIO_PCISR)
RDATA (PIO_PCRHR)
0x01
Read of PIO_PCISR
0x23
0x34
0x45
0x12
0x56
0x67
0x7
8
0x
8
9
0x3423_1201
MCK
PIODCCLK
PIODC[7:0]
PIODCEN1
PIODCEN2
DRDY (PIO_PCISR)
RDATA (PIO_PCRHR)
0x01
Read of PIO_PCISR
0x7
8
67_5645
Summary of Contents for SAM4S Series
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Page 1143: ...1143 11100B ATARM 31 Jul 12 SAM4S Series Preliminary Figure 43 4 64 lead LQFP Package Drawing ...
Page 1145: ...1145 11100B ATARM 31 Jul 12 SAM4S Series Preliminary Figure 43 5 64 lead QFN Package Drawing ...