AT32UC3A3256S_1 Datasheet, PDF (164/961 Pages) ATMEL Corporation – AVR32 32-Bit Microcontroller

AT32UC3A3
Figure 15-4. CompactFlash Application Example
EBI
DATA[15:0]
CFRNW
NCS[4]
DIR /OE
Pxx
/OE
ADDR[10:0]
ADDR[22]
NRD
NWE0
NWE1
ADDR[23]
CFCE1
CFCE2
NWAIT
CompactFlash
Connector
D[15:0]
_CD1
_CD2
A[10:0]
_REG
_OE
_WE
_IORD
_IOWR
_CE1
_CE2
_WAIT
15.6.6
SmartMedia and NAND Flash Support
The EBI integrates circuitry that interfaces to SmartMedia and NAND Flash devices.
The NAND Flash logic is driven by the Static Memory Controller on the NCS[2] (and/or NCS[3])
address space. Writing to the HMATRIX.SFR6.CS2A (and/or HMATRIX.SFR6.CS3A) bit the
appropriate value enables the NAND Flash logic. Access to an external NAND Flash device is
then made by accessing the address space reserved to NCS[2] (and/or NCS[3]).
The NAND Flash logic drives the read and write command signals of the SMC on the NANDOE
and NANDWE signals when the NCS[2] (and/or NCS[3]) signal is active. NANDOE and
NANDWE are invalidated as soon as the transfer address fails to lie in the NCS[2] (and/or
NCS[3]) address space. See Figure 15-5 on page 165 for more informations. For details on
these waveforms, refer to the SMC Section.
The SmartMedia device is connected the same way as the NAND Flash device.
32072A–AVR32–03/09
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