Cypress CY3684 - Page 112

112 EZ-USB Development Kit User Guide, Doc. # 001-66390 Rev. *D
ELSE WHEN(modesw == 11) THEN" Ext P&D mem at 0000 and 8000
{
!nRAMCE = 1;
!nRAMOE= !nRD # !nPSEN;
EA = 0;
}
ELSE WHEN(modesw == 10) THEN" All program mem external
{
!nRAMCE = 1;
!nRAMOE =!nRD # !nPSEN;
EA = 1;
}
test_vectors
([mm1,mm0,A15,nRD,nPSEN] -> [nRAMCE, nRAMOE, EA])
[ 0 , 0 , x , x , x ] -> [ 1 , 1 , 0];" 10: all mem selects and
strobes OFF
[ 0 , 1 , 0 , 1 , 1 ] -> [ 1 , 1 , 0];" 01: top of mem for rd or
psen
[ 0 , 1 , 1 , 1 , 0 ] -> [ 0 , 0 , 0];" PSEN only
[ 0 , 1 , 1 , 0 , 1 ] -> [ 0 , 0 , 0];" RD only
[ 0 , 1 , 1 , 1 , 1 ] -> [ 0 , 1 , 0];" Neither RD or PSEN
[ 1 , 1 , 0 , 1 , 0 ] -> [ 0 , 0 , 0];" 11: top and bot mem for rd
or psen
[ 1 , 1 , 0 , 0 , 1 ] -> [ 0 , 0 , 0];
[ 1 , 1 , 0 , 1 , 1 ] -> [ 0 , 1 , 0];
[ 1 , 1 , 1 , 1 , 0 ] -> [ 1 , 0 , 0];" PSEN
[ 1 , 1 , 1 , 0 , 1 ] -> [ 1 , 0 , 0];" RD
[ 1 , 1 , 1 , 1 , 1 ] -> [ 1 , 1 , 0];" neither
[ 1 , 0 , 1 , 1 , 0 ] -> [ 1 , 0 , 1];" PSEN
[ 1 , 0 , 1 , 0 , 1 ] -> [ 1 , 0 , 1];" RD
[ 1 , 0 , 1 , 1 , 1 ] -> [ 1 , 1 , 1];" neither
test_vectors
([nRD,nPSEN] -> [nRAMOE])
[ 0 , 0 ] -> [ 0 ];
[ 0 , 1 ] -> [ 0 ];
[ 1 , 0 ] -> [ 0 ];
[ 1 , 1 ] -> [ 1 ];
test_vectors
(addr -> [PF0, PF1, PF2, PF3])
[1,0,0,0,0,0] -> [0, 0, 0, 0];
[1,0,0,0,1,0] -> [1, 0, 0, 0];
END