AT91 datasheet(45/153 Pages) ATMEL

45 / 153 page

AT91X40 Series

1354D–ATARM–08/02

EBI User Interface

The EBI is programmed using the registers listed in the table below. The Remap Control

The Memory Control Register (EBI_MCR) is used to program the number of active chip

selects and data read protocol. Eight Chip Select Registers (EBI_CSR0 to EBI_CSR7)

are used to program the parameters for the individual external memories. Each

EBI_CSR must be programmed with a different base address, even for unused chip

selects.

Base Address: 0xFFE00000 (Code Label EBI_BASE)

Notes:

1. 8-bit boot (if BMS is detected high)

2. 16-bit boot (if BMS is detected low)

Table 6. EBI Memory Map

Offset

Name

Access

Reset State

0x00

Chip Select Register 0

EBI_CSR0

Read/Write

0x0000203E(1)

0x0000203D(2)

0x04

Chip Select Register 1

EBI_CSR1

Read/Write

0x10000000

0x08

Chip Select Register 2

EBI_CSR2

Read/Write

0x20000000

0x0C

Chip Select Register 3

EBI_CSR3

Read/Write

0x30000000

0x10

Chip Select Register 4

EBI_CSR4

Read/Write

0x40000000

0x14

Chip Select Register 5

EBI_CSR5

Read/Write

0x50000000

0x18

Chip Select Register 6

EBI_CSR6

Read/Write

0x60000000

0x1C

Chip Select Register 7

EBI_CSR7

Read/Write

0x70000000

0x20

Remap Control Register

EBI_RCR

Write only

–

0x24

Memory Control

EBI_MCR

Read/Write

AT91 Datasheet(PDF) 45 Page - ATMEL Corporation

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