LG U8210, Service Manual, Page: 44 / 231

3. TECHNICAL BRIEF
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3.9 External memory interface
A. MSM6250
The MSM6250 device has two external memory interfaces with arbitration for the multi-layer AHB
system and memory controllers. The EBI1 bus is a high performance bus that supports a wide variety
of memories. EBI2 bus is targeted to be the interface for slow peripheral devices(i,.e., LCD) as well as
the NAND flash memory.
• EBI1 Features
- 16 bit static and dynamic memory interface
- 32 bit dynamic memory interface
- 24 bits of address for static memory devices which can support up to 32MBytes on each chip select
- Synchronous burst memories supported (burst NOR, burst PSRAM)
- Synchronous DRAM memories supported
- Byte addressable memory supporting 8 bit, 16 bit and 32 bit accesses
- Pseudo SRAM (PSRAM) memory support
• EBI2 Features
- Support for asynchronous FLASH and SRAM(16bit & 8bit).
- Interface support for byte addressable 16bit devices(UB_N & LB_N signals).
- 2Mbytes of memory per chip select.
- Support for 8 bit wide NAND flash.
- Support for parallel LCD interfaces, port mapped of memory mapped(16 & 8 bit)
• 512Mb NAND flash 512Mb SDRAM
• 2-CS(Chip Select) are used
Interface Spec
Device Part Name Maker Read Access Time Write Access Time
FLASH TY90009C00A0GG Toshiba 65 ns 65 ns
SDRAM TY90009C00A0GG Toshiba 13 ns 13 ns
Table 3.9-1 External memory interface for U8210