Rainbow Electronics W90P710CDG - Manual (Page 73)

W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 73 - Revision B2
Continued.
BITS DESCRIPTION
[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 32-bit Pull-up
Pull-down 32-bit
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
Fig6.3.2 ROM/FLASH Read Operation Timing