Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Data Sheet

32072H–AVR32–10/2012

Figure 14-5. CompactFlash Application Example without I/O mode

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 

 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.

EBI

CompactFlash 

Connector

DATA[15:0]

CFRNW

NCS[4]

Pxx

ADDR[10:0]

ADDR[22]

NRD

NWE0

NWE1

CFCE1

CFCE2

NWAIT

_WAIT

_CE2

_CE1

_IOWR

_IORD

_WE

_OE

_REG

A[10:0]

_CD2

_CD1

D[15:0]

/OE

/OE

DIR

ADDR[21]