Datasheet

171

32072H–AVR32–10/2012

AT32UC3A3

Figure 14-3. CompactFlash Read/Write Control Signals

14.6.5.4 Multiplexing of CompactFlash signals on EBI pins

Table 14-7 on page 171 and Table on page 171 illustrate the multiplexing of the CompactFlash

logic signals with other EBI signals on the EBI pins. The EBI pins in Table 14-7 on page 171 are

strictly dedicated to the CompactFlash interface as soon as the HMATRIX.SFR6.CS4A and/or

HMATRIX.SFR6.CS5A bits is/are written. These pins must not be used to drive any other mem-

ory devices.

The EBI pins in Table 14-8 on page 172 remain shared between all memory areas when the cor-

responding CompactFlash interface is enabled (CS4A = 1 and/or CS5A = 1).

Table 14-6. CompactFlash Mode Selection

Mode Base Address CFNOE CFNWE CFNIORD

Attribute Memory

I/O Mode (Write operations)

Common Memory

NRD_NOE NWR0_NWE 1

I/O Mode (Read operations) 1 1 NRD_NOE

A22

A23

SMC

NRD

NWR0/NWE

Compact Flash Logic

EBI

CFNOE

CFNWE

CFNIORD

Table 14-7. Dedicated CompactFlash Interface Multiplexing

Pins

CompactFlash Signals EBI Signals

CS4A = 1 CS5A = 1 CS4A = 0 CS5A = 0

NCS[4] CFCS0 NCS[4]

NCS[5] CFCS1 NCS[5]