LayerscapeのトピックIFC CONNECTION TO 16BIT NOR FLASH IN LS1043ARDB

IFC CONNECTION TO 16BIT NOR FLASH IN LS1043ARDB

Pamid — Wed, 27 Sep 2023 17:06:49 GMT

We are using LS1043ARDB and as per schematic diagram IFC connection to 16 bit NOR FLASH is in ADM-SHFT-MODE=0(as per LS1043A Reference manual figure 25.9). As per this mode, IFC_AD0 should be MSB and it should get connected to NOR FLASH ADDRESS line A25. But IFC_AD1 is connected to A25 address pin of FLASH. Please clarify.

IFC_A26 is the LSB bit and it should be left un connected( for 16 bit operation). but it is connected to A0 Address pin of NOR FLASH.Please clarify.

Re: IFC CONNECTION TO 16BIT NOR FLASH IN LS1043ARDB

mrudangshelat-13 — Thu, 28 Sep 2023 06:49:28 GMT

Hi @Pamid,

Please refer to figure 25-9 available in LS1043ARM which is the connection of x16 NOR for ADM MODE0. Please follow the connection details for your design.

Regards,
Mrudang

Re: IFC CONNECTION TO 16BIT NOR FLASH IN LS1043ARDB

Pamid — Thu, 28 Sep 2023 08:27:29 GMT

In LS1043A RDB-PD , 16 Bit NOR FLASH is connected to IFC interface of LS1043A. As per this

IFC_ADDR[1:15] is connected to A[25:11].

IFC_ADDR[16:26] is connected to A[10: 0].

But as per LS1043ARM Fig:25-9, IFC_AD0 after address decoding should get connect to A25 address line of NOR FLASH. I am confusing while co-relating LS1043ARM Fig:25-9 with 16 Bit NOR FLASH connectivity in LS1043A RDB-PD. Please clarify.