W90P710_05 Datasheet, PDF (74/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Continued.
BITS
[3:2]
BTSIZE
[1:0]
PGMODE
DESCRIPTION
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]
0
0
0
1
1
0
1
1
Bus Width
8-bit
16-bit
32-bit
RESERVED
D [13:12]
Pull-down Pull-down
Pull-down Pull-up
Pull-up Pull-down
Pull-up Pull-up
Bus Width
8-bit
16-bit
32-bit
RESERVED
Page mode configuration
PGMODE [1:0]
0
0
0
1
1
0
1
1
Mode
Normal ROM
4 word page
8 word page
16 word page
Fig7.3.2 ROM/FLASH Read Operation Timing
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