Rainbow Electronics W90N740 - Manual (Page 59)

W90N740
Publication Release Date: November 26, 2004
- 55 - Revision A4
tACS [7:5] ：Address set-up before nECS for external I/O bank 0~3
tACS [7:5] MCLK
0 0 0 0
0 0 1 1
0 1 0 2
0 1 1 3
1 0 0 4
1 0 1 5
1 1 0 6
1 1 1 7
tCOS [4:2]：Chip selection set-up time on nOE or nWBE for external I/O bank 0~3
When ROM/Flash memory bank is configured, the access to its bank stretches chip selection time before
the nOE or new signal is activated.
tCOS [4:2] MCLK
0 0 0 0
0 0 1 1
0 1 0 2
0 1 1 3
1 0 0 4
1 0 1 5
1 1 0 6
1 1 1 7
DBWD [1:0] ：Programmable data bus width for external I/O bank 0~3
DBWD [1:0] Width of Data Bus
0 0 Disable bus
0 1 8-bit
1 0 16-bit
1 1 32-bit