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

32072H–AVR32–10/2012

• CLK_ECCHRS

Refer to 

 to configure those clocks.

The EBI interface has two interrupt lines connected to the Interrupt Controller:

• SDRAMC_IRQ: Interrupt signal coming from the SDRAMC

• ECCHRS_IRQ: Interrupt signal coming from the ECCHRS 

Handling the EBI interrupt requires configuring the interrupt controller before configuring the EBI.

The EBI interface is connected to the HMATRIX Special Function Register 6 (SFR6). The user
must first write to this HMATRIX.SFR6 to configure the EBI correctly.

EBI Clocks Configuration

Clocks name

Clocks 
type

Type of the Interfaced Device

SDRAM

SRAM, PROM, 
EPROM, 
EEPROM, Flash

NandFlash

SmartMedia

CompactFlash

CLK_EBI

HSB

X

X

X

X

CLK_SDRAMC

PB

X

CLK_SMC

PB

X

X

X

CLK_ECCHRS

PB

X

EBI Special Function Register Fields Description

[31:6]

Reserved

5

CS5A

0 = Chip Select 5 (NCS[5]) is connected to a Static Memory device. For each 
access to the NCS[5] memory space, all related pins act as SMC pins

1 = Chip Select 5 (NCS[5]) is connected to a CompactFlash device. For each 
access to the NCS[5] memory space, all related pins act as CompactFlash 
pins

4

CS4A

0 = Chip Select 4 (NCS[4]) is connected to a Static Memory device. For each 
access to the NCS[4] memory space, all related pins act as SMC pins

1 = Chip Select 4 (NCS[4]) is connected to a CompactFlash device. For each 
access to the NCS[4] memory space, all related pins act as CompactFlash 
pins

3

CS3A

0 = Chip Select 3 (NCS[3]) is connected to a Static Memory device. For each 
access to the NCS[3] memory space, all related pins act as SMC pins

1 = Chip Select 3 (NCS[3]) is connected to a NandFlash or a SmartMedia 
device. For each access to the NCS[3] memory space, all related pins act as 
NandFlash or SmartMedia pins