Datasheet

SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
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20. External Bus Interface (EBI)
20.1 Overview
The External Bus Interface (EBI) is designed to ensure the successful data transfer between several external
devices and the embedded Memory Controller of an ARM-based device. The Static Memory, SDRAM and ECC
Controllers are all featured external Memory Controllers on the EBI. These external Memory Controllers are
capable of handling several types of external memory and peripheral devices, such as SRAM, PROM, EPROM,
EEPROM, Flash, and SDRAM.
The EBI0 also supports the CompactFlash and the NAND Flash protocols via integrated circuitry that greatly
reduces the requirements for external components. Furthermore, the EBI0 handles data transfers with up to six
external devices, each assigned to six address spaces defined by the embedded Memory Controller. Data
transfers are performed through a 16-bit or 32-bit data bus, an address bus of up to 26 bits, up to six chip select
lines (NCS[5:0]) and several control pins that are generally multiplexed between the different external Memory
Controllers.
The EBI1 also supports the NAND Flash protocols via integrated circuitry that greatly reduces the requirements for
external components. Furthermore, the EBI1 handles data transfers with up to three external devices, each
assigned to three address spaces defined by the embedded Memory Controller. Data transfers are performed
through a 16-bit or 32-bit data bus, an address bus of up to 23 bits, up to three chip select lines (NCS[2:0]) and
several control pins that are generally multiplexed between the different external Memory Controllers.