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2013-02-13T12:27:47Z

Created page with "This information has been provided by Electronic Design Bitzer. Some XMEGA processors have an EBI. The following circuit shows how to set up the EBI for 8 bit bus mode where ..."

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This information has been provided by Electronic Design Bitzer.

Some XMEGA processors have an EBI. The following circuit shows how to set up the EBI for 8 bit bus mode where the SRAM can be selected with a jumper.

128 KB SM621008VLLP70T : SRAM LLPow 3,3V 128Kx8 70ns TSOP32(I)

512 KB SM624008VLLP70M : SRAM LLPow 3,3V 512Kx8 70ns SOP32

 

The BASCOM setup code :

   ' All EBI-Ports must be set to OUTPUT

   ' All Ports, ACTIVE-LOW , must be set to 1 !!!

   ' All Ports, ACTIVE-HIGH, must be set to 0 !!!

 

   Porth_dirset = &B1111_1111 : Porth = &B1111_0011         'WR, RD, ALE1, ALE2, CS0-3  = output : ALE1 & 2 auf 0 !!!

   Portj_dirset = &B1111_1111 : Portj = &B1111_1111

   Portk_dirset = &B1111_1111 : Portk = &B1111_1111

 

 

Config Xram = 3port , Ale = Ale12 , Sdbus = 8 , Modesel0 = Sram , Adrsize0 = 256b , Waitstate0 = 4 , Baseadr0 = &H10000 , _

               Modesel1 = Sram , Adrsize1 = 128k , Waitstate1 = 1 , Baseadr1 = &H20000

 

 

See also : [[CONFIG XRAM|CONFIG XRAM]]

[[File:Xram-ebi.zoom58.png|thumb|center|700px]]

 

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[[Category:BASCOM_HARDWARE]]

Adding XRAM to XMEGA using EBI - Revision history

Admin: Created page with "This information has been provided by Electronic Design Bitzer. Some XMEGA processors have an EBI. The following circuit shows how to set up the EBI for 8 bit bus mode where ..."