LH79524 View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

LH79524

System-on-Chip

NXP Semiconductors. 

System-on-Chip

NXP Semiconductors

LH79524/LH79525

External Memory Controller

An integrated External Memory Controller (EMC)

provides a glueless interface to external SDRAM, Low

Power SDRAM, Flash, SRAM, ROM, and burst ROM.

Three remap options for the physical memory are

selectable by software, as shown in Figure 5 through

Figure 8.

The EMC supports six banks of external memory. Two

chip selects for synchronous memory, and either two

(LH79525) or four (LH79524) static memory chip selects

are available. The static interface also includes two

(LH79525) or four (LH79524) byte lane enable signals.

0xFFFFFFFF

0xFFFF1000

0xFFFF0000

0xFFFC0000

0xA0000000

0x80000000

0x60000000

0x40000000

0x20000000

0x00000000

ADVANCED HIGH-PERFORMANCE BUS

PERIPHERALS

RESERVED

ADVANCED PERIPHERAL BUS

PERIPHERALS

RESERVED

BOOT ROM

16KB INTERNAL SRAM

EXTERNAL STATIC MEMORY

EXTERNAL SDRAM

EXTERNAL SRAM nCS1

REMAP = 00

LH79525-15

Figure 5. Memory Remap ‘00’

0xFFFFFFFF

0xFFFF1000

0xFFFF0000

0xFFFC0000

0xA0000000

0x80000000

0x60000000

0x40000000

0x20000000

0x00000000

ADVANCED HIGH-PERFORMANCE BUS

PERIPHERALS

RESERVED

ADVANCED PERIPHERAL BUS

PERIPHERALS

RESERVED

BOOT ROM

16KB INTERNAL SRAM

EXTERNAL STATIC MEMORY

EXTERNAL SDRAM

EXTERNAL SDRAM nDCS0

REMAP = 01

LH79525-16

Figure 6. Memory Remap ‘01’

0xFFFFFFFF

0xFFFF1000

0xFFFF0000

0xFFFC0000

0xA0000000

0x80000000

0x60000000

0x40000000

0x20000000

0x00000000

ADVANCED HIGH-PERFORMANCE BUS

PERIPHERALS

RESERVED

ADVANCED PERIPHERAL BUS

PERIPHERALS

RESERVED

BOOT ROM

16KB INTERNAL SRAM

EXTERNAL STATIC MEMORY

EXTERNAL SDRAM

INTERNAL SRAM

REMAP = 10

LH79525-17

Figure 7. Memory Remap ‘10’

Product data sheet

Rev. 02 — 17 March 2009

21

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