Static memory controller

150
NS9750 Hardware Reference

partitioned memory devices" on page 150 and "Memory banks constructed from 8-bit

or non-byte-partitioned memory devices" on page 150 explain why different

connections, with respect to WEOUT_n and BLSOUT[3:0]_n, for different memory

configurations.

Address connectivity

The static memory address output signal ADDROUT[27:0] must be right-justified.

Memory banks constructed from 8-bit or non-byte-partitioned memory devices

For memory banks constructed from 8-bit or non-byte-partitioned memory devices, it

is important that the byte lane state (PB) bit is cleared to 0 within the respective

memory bank control register. This forces all BLSOUT[3:0]_n lines high during a read

access, as the byte lane selects are connected to the device write enables.

A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[3]_n
DATA[31:24]
A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[2]_n
DATA[23:16]
A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[1]_n
DATA[15:8]
A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[0]_n
DATA[7:0]
32-bit bank consisting of four 8-bit devices
A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[1]_n
DATA[15:8]
A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[0]_n
DATA[7:0]
16-bit bank consisting of two 8-bit devices
A[20:0]
CE_n
OE_n
WE_n
IO[7:0]
BLSOUT[0]_n
DATA[7:0]
OEOUT_n
ADDROUT[20:0]_n
STCSOUT_n
8-bit bank consisting of one 8-bit device
ADDROUT[20:0]
STCSOUT_n
OEOUT_n
ADDROUT[20:0]
STCSOUT_n
OEOUT_n