Achronix Speedster22i User Macro Guide User Manual
Page 114
Memories
BRAM80K
Speedster22i Macro Cell Library
PAGE 97
Table 6-10: douta(doutb) bit assignments per porta_read_width(portb_read_width) values
porta_read_width,
portb_read_width
doutpxa[3:0],
doutpxb[3:0]
doutpa[3:0],
doutpb[3:0]
douta[31:0],
doutb[31:0]
user_dout[39:36]
user_dout[35:32]
user_dout[31:0]
4’hx
user_dout[35:32]
user_dout[31:0]
4’hx
4’hx
user_dout[31:0]
2’bxx,user_dout[19:18]
2’bxx,user_dout[17:16]
16’hxxxx,user_dout[15:0]
4’hx
user_dout[17:16]
16’hxxxx,user_dout[15:0]
4’hx
4’hx
16’hxxxx,user_dout[15:0]
3’bxxx,user_dout[9]
3’bxxx,user_dout[8]
24’hxxxxxx,user_dout[7:0]
4’hx
3’bxxx,user_dout[8]
24’hxxxxxx,user_dout[7:0]
4’hx
4’hx
24’hxxxxxx,user_dout[7:0]
4’hx
3’bxxx,user_dout[4]
28’hxxxxxxx,user_dout[3:0]
4’hx
4’hx
28’hxxxxxxx,user_dout[3:0]
4’hx
4’hx
30’hxxxxxxxx,user_dout[1:0]
4’hx
4’hx
31’hxxxxxxxx,user_dout[0]
Table 6-11: BRAM80K Address Bus Mapping (Per Port)
Memory
Organization
Used Address
addra/addrb Pins
Unconnected
Address Pins
40
36
32
20
18
16
10
9
8
5
4
2
1
2kx40
15:5
4:0
2kx36
15:5
4:0
2kx32
15:5
4:0
4kx20
15:4
3:0
4kx18
15:4
3:0
4kx16
15:4
3:0
8kx10
15:3
2:0
8kx9
15:3
2:0
8kx8
15:3
2:0
16kx5
15:2
1:0
16kx4
15:2
1:0
32kx2
15:1
0
64kx1
15:0
-