Table 4-13 Word Address To Physical Address Mapping For Sram - Motorola DSP56009 User Manual

External Memory Interface
EMI Address Generation

Table 4-13 Word Address to Physical Address Mapping for SRAM

EAM SRAM EWL
[3:0] Max size [2:0]
0000 1 × 32 K
xx
0001 1 × 256 K 000
X01
X1X
0010 2 × 128 K 000
X01
X1X
4-26
EBW MCS0
x High MRAS
0 Low A16
1 Low A17
0 Low A15
1 Low A16
0 Low A14
1 Low A15
0 MCS0 = C0 MCS1 = C0 A16
1 MCS0 = A0 MCS1 = A0 A17
0 MCS0 = C1 MCS1 = C1 A15
1 MCS0 = C0 MCS1 = C0 A16
0 MCS0 = C2 MCS1 = C2 A14
1 MCS0 = C1 MCS1 = C1 A15
DSP56009 User's Manual
MRAS MCAS
MCAS
A15
A16
A14
A15
A13
A14
MA15 MA [14:0]
High A [14:0]
A14 A [13:0], C0
A15 A [14:0]
A13 A[12:0],
C0, C1
A14 A[13:0], C0
A12 A[11:0],
C0,C1, C2
A13 A[12:0],
C0, C1
A15 A [14:0]
A16 A [15:1]
A14 A[13:0], C0
A15 A [14:0]
A13 A[12:0],
C0, C1
A14 A[13:0], C0
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