Rainbow Electronics W90N740 - Manual (Page 49)

W90N740
Publication Release Date: November 26, 2004
- 45 - Revision A4
tPA [11:8]：Page mode access cycle time
tPA [11:8] MCLK
0 0 0 0 1
0 0 0 1 2
0 0 1 0 3
0 0 1 1 4
0 1 0 0 5
0 1 0 1 6
0 1 1 0 7
0 1 1 1 8
tPA [11:8] MCLK
1 0 0 0 10
1 0 0 1 12
1 0 1 0 14
1 0 1 1 16
1 1 0 0 18
1 1 0 1 20
1 1 1 0 22
1 1 1 1 24
tACC [7:4]：Access cycle time
tACC [7:4] MCLK
0 0 0 0 1
0 0 0 1 2
0 0 1 0 3
0 0 1 1 4
0 1 0 0 5
0 1 0 1 6
0 1 1 0 7
0 1 1 1 8
tACC [7:4] MCLK
1 0 0 0 10
1 0 0 1 12
1 0 1 0 14
1 0 1 1 16
1 1 0 0 18
1 1 0 1 20
1 1 1 0 22
1 1 1 1 24
BTSIZE [3:2] ：Read only, the boot ROM/FLASH data bus width
This ROM/Flash bank is designed for a boot ROM. BASADDR bits determine its start address. The
external data bus width is determined by the data bus signals D [13:12] power-on setting.
BTSIZE [3:2] Bus Width D [13:12] Bus Width
0 0 8-bit Pull-down Pull-down 8-bit
0 1 16-bit Pull-down Pull-up 16-bit
1 0 32-bit Pull-up Pull-down 32-bit
1 1 RESERVED Pull-up Pull-up RESERVED