Talk:Connecting NOR Flash to OMAP-L138

Comments on Connecting NOR Flash to OMAP-L138 -

Brakanjan said ...
Regarding pin EMA_BA[0] on the TMS320C6748, the "TMS320C674x/OMAP-L1x Processor External Memory Interface A (EMIFA) User's Guide" (SPRUFL6F, page 27) as well as the "TMS320C6748 DSP Technical Reference Manual" (SPRUH79A, page 776) state the following:

"Additionally, when the EMIFA interfaces to a 16-bit asynchronous device, the EMA_BA[0] pin can serve as the upper address line EMA_A[22]."

Question 1: How should the EMIFA be set up to support this case? Unfortunately, none of the diagrams explicitly show this connection case. Is this mode supported by the EMIFA hardware natively (i.e. directly controlled by the EMIFA hardware block in a particular mode) or is the intention of this sentence only that the pin may be used as additional GPIO pin for use as bank select (for the higher address pins) under software control?

"Additionally, when the EMIFA interfaces to a 16-bit asynchronous device, the EMA_BA[0] pin can serve as the upper address line EMA_A[22]."

Question 2: Should this not be EMA_A[23]? The TMS320C6748 already has dedicated EMA_A[22:0] pins, the next higher address pin should therefore be EMA_A[23].

--Brakanjan 09:23, 7 August 2012 (CDT)