AM625SIP: How to do 32-Bit Address/Data-Multiplexed Memory

Hi Shu,

Which SDK are you using? This will help me assign to the correct expert.

Thanks,

Anshu

Hi Aushu,

I am not using any SDK. I am working on hardware design to connect the AM625 and my FPGA using GPMC. I saw the differential ways to use GPMC in manual. But i don't understand how to do the 32-bit connection between two devices. looks like there are no physical pins or repurposed functions call GPMC0_AD[31-16].

BR,
Shu

Hi, is it possible to do GPMC 32-bit connection using am625sip? if yes, how to do it? or where i can refer to? i am stuck by the GPMC0_AD[31-16]. 

BR

Hi Shu,

Apologies for the delay. I will loop in the GPMC expert now.

Hello Shu, 

Please refer the below sections of the data sheet for general interface recommendations and supported memory interface.

Data sheet reference 

6.3.11 GPMC
6.3.11.1 MAIN Domain
Table 6-25. GPMC0 Signal Descriptions

TRM reference 

Table 12-187 shows the use of address and data GPMC pins based on the type of external device.
Table 12-187. GPMC Pin Multiplexing Options

12.4.3.4.12.2.1.1 Memory Pin Multiplexing
This section describes the interfacing differences of the GPMC supported memories

Regards,

Sreenivasa

Hi Sreenivasa,

That make me more confuse.

Table 12-213 only show 16-bit multiplexed connection in section 12.4.3.4.12.2.1.1.

But Table 12-187 show both 32-bit and 16-bit multiplexed connection. So the AM625SIP doesn't support 32-bit connection, it is a mistake in the manual, does that make sense?

I also check datasheet section 6.3.11 and 6.3.11, and table 6-25. There is no related information about GPMC0_AD[31-16] which is shown in manual Table 12-187.

If the manual is correct, what the 32-bit mean, how to use it?

BR,
Shu