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Known bugs of the T48 uController core
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Known bugs of the T48 uController core
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======================================
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======================================
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Version: $Date: 2005-11-02 21:16:34 $
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Version: $Date: 2006-07-14 01:06:36 $
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Release 0.6.1 BETA
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------------------
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*******************************************************************************
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Deassertion of PROG too early
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PROG is deasserted in XTAL2 cycle which might lead to read data being already
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invalid (tri-stated) when the core samples P2[3:0] at the end of XTAL3.
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Fixed in:
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clock_ctrl.vhd 1.12
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Fix will be included in next release.
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Release 0.6 BETA
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Release 0.6 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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Deassertion of PROG too early
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See above.
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*******************************************************************************
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P2 Port value restored after expander access
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P2 Port value restored after expander access
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After access to expander interface (ANLD Pp; MOVD A,Pp; MOVD Pp,A; ORLD Pp)
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After access to expander interface (ANLD Pp; MOVD A,Pp; MOVD Pp,A; ORLD Pp)
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the port value of P2 is restored. This is wrong according to chapter "Port 2
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the port value of P2 is restored. This is wrong according to chapter "Port 2
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Operations" of the "Expanded MCS-48 System" manual. It states that previously
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Operations" of the "Expanded MCS-48 System" manual. It states that previously
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Release 0.5 BETA
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Release 0.5 BETA
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----------------
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----------------
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*******************************************************************************
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*******************************************************************************
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Deassertion of PROG too early
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See above.
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*******************************************************************************
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P2 Port value restored after expander access
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P2 Port value restored after expander access
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See above.
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See above.
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*******************************************************************************
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*******************************************************************************
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