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Fabricante

AT32UC3A3128

32-bit AVR® Microcontroller

Atmel Corporation 

AT32UC3A3/A4

Table 4-8. Signal Description List

Signal Name

Function

Type

Active

Level Comments

RESET_N

Reset Pin

Input

Low

DMA Controller - DMACA (optional)

DMAACK[1:0]

DMA Acknowledge

Output

DMARQ[1:0]

DMA Requests

Input

External Interrupt Controller - EIC

EXTINT[7:0]

External Interrupt Pins

Input

SCAN[7:0]

Keypad Scan Pins

Output

NMI

Non-Maskable Interrupt Pin

Input

Low

General Purpose Input/Output pin - GPIOA, GPIOB, GPIOC, GPIOX

PA[31:0]

Parallel I/O Controller GPIO port A

I/O

PB[11:0]

Parallel I/O Controller GPIO port B

I/O

PC[5:0]

Parallel I/O Controller GPIO port C

I/O

PX[59:0]

Parallel I/O Controller GPIO port X

I/O

External Bus Interface - EBI

ADDR[23:0]

Address Bus

Output

CAS

Column Signal

Output

Low

CFCE1

Compact Flash 1 Chip Enable

Output

Low

CFCE2

Compact Flash 2 Chip Enable

Output

Low

CFRNW

Compact Flash Read Not Write

Output

DATA[15:0]

Data Bus

I/O

NANDOE

NAND Flash Output Enable

Output

Low

NANDWE

NAND Flash Write Enable

Output

Low

NCS[5:0]

Chip Select

Output

Low

NRD

Read Signal

Output

Low

NWAIT

External Wait Signal

Input

Low

NWE0

Write Enable 0

Output

Low

NWE1

Write Enable 1

Output

Low

RAS

Row Signal

Output

Low

19

32072C–AVR32–2010/03

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