Omapl-138 Reset; External Memory; Figure 3-3 Diagram Of Omap-L138 - RCA RDR9000 Service Manual

Service Manual 3. Baseband Section
OMAP-L138 Dual-Core Processor

Figure 3-3 Diagram of OMAP-L138

3.2.3 OMAPL-138 Reset

OMAP-L138 is reset by the dedicated extended chip (U2003) and is active low.

3.2.4 External Memory

OMAP-L138 (U2000) provides two types of external memory interfaces: EMIFA and
DDR2/MDDR Controller.
 EMIFA
EMIFA is an 8/16-bit interface and provides four 32 MB chip selects EMA_CS [5:2].This
interface supports connection to the NOR flash. NOR flash is mainly used to access program
and database.
 DDR2/MDDR Controller
DDR2/MDDR controller is a 16-bit interface and provides one 512 Mbit (max.) chip select,
and it can connect up to eight banks. This interface supports MDDR and the latter is mainly
used to store intermediate data and move the flash program to run on it, speeding up radio
operation.
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