Rainbow Electronics W90N745CDG - Manual (Page 70)

W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
- 65 - Revision A2
Continued.
BITS DESCRIPTION
[11:8] tPA
Page mode access cycle time
tPA[11:8] MCLK tPA[11:8] MCLK
0 0 0 0 1 1 0 0 0 10
0 0 0 1 2 1 0 0 1 12
0 0 1 0 3 1 0 1 0 14
0 0 1 1 4 1 0 1 1 16
0 1 0 0 5 1 1 0 0 18
0 1 0 1 6 1 1 0 1 20
0 1 1 0 7 1 1 1 0 22
0 1 1 1 8 1 1 1 1 24
[7:4] tACC
Access cycle time
tACC[11:8] MCLK tACC[11:8] MCLK
0 0 0 0 1 1 0 0 0 10
0 0 0 1 2 1 0 0 1 12
0 0 1 0 3 1 0 1 0 14
0 0 1 1 4 1 0 1 1 16
0 1 0 0 5 1 1 0 0 18
0 1 0 1 6 1 1 0 1 20
0 1 1 0 7 1 1 1 0 22
0 1 1 1 8 1 1 1 1 24
[3:2] BTSIZE
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
RESERVED Pull-up Pull-down RESERVED
1 1 RESERVED Pull-up Pull-up RESERVED
[1:0] PGMODE
Page mode configuration
PGMODE [1:0] Mode
0 0 Normal ROM
0 1 4 word page
1 0 8 word page
1 1 16 word page