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IEMIT - memory configurer

Note: To work directly with tstate and strobe setup values you must select the configuration "external" otherwise the values will be overwritten after any update. To print this page correct, you should enable "Print Background Colors and Images" under Page setup.

The IMS T400, T414, T425, T800 and the T805 transputer have a configurable external memory interface which allows a variety of types of memory devices to be connected using few components. For these transputers, the interface configuration may be selected by one of two mechanisms. The user may select one of the 17 standard (internal) memory configurations (13 for the T414) or a customised (external) memory configuration may be loaded from a ROM or PAL on reset.

Setup

Configuration
Wait states

Tstate 1-6
Strobe 1-4
Refresh/Write /

External memory cycle

3 processor cycles, refresh every 14.4μs

Tstate   T1 T2 T3 T4 T5 T6  
         
ProcClockOut                
         
notMemS0                
         
notMemS1     3          
         
notMemS2     1          
         
notMemS3     2          
         
notMemS4     3          
         
MemAD (read)
A

D

         
notMemRd                
         
MemAD (write)
A D
         
notMemWrB0-3     E          
         
MemWait -- ---- ----     ---- ---- --
         

ROM table

#7FFFFF6C - 0    #7FFFFF90 - 0    #7FFFFFB4 - 0    #7FFFFFD8 - 1
#7FFFFF70 - 0    #7FFFFF94 - 0    #7FFFFFB8 - 0    #7FFFFFDC - 1
#7FFFFF74 - 0    #7FFFFF98 - 0    #7FFFFFBC - 0    #7FFFFFE0 - 0
#7FFFFF78 - 0    #7FFFFF9C - 1    #7FFFFFC0 - 0    #7FFFFFE4 - 0
#7FFFFF7C - 0    #7FFFFFA0 - 1    #7FFFFFC4 - 0    #7FFFFFE8 - 0
#7FFFFF80 - 0    #7FFFFFA4 - 0    #7FFFFFC8 - 1    #7FFFFFEC - 1
#7FFFFF84 - 0    #7FFFFFA8 - 0    #7FFFFFCC - 0    #7FFFFFF0 - 1
#7FFFFF88 - 0    #7FFFFFAC - 0    #7FFFFFD0 - 0    #7FFFFFF4 - 1
#7FFFFF8C - 0    #7FFFFFB0 - 1    #7FFFFFD4 - 0    #7FFFFFF8 - 0

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Last modification: 12.01.2011 16:32:40