Preliminary - Information Subject to Change - 9/24/98
EZ-USB Development Board
5 - 11
Memory Maps
Configuration 00
None of the development board external RAM is used in
configuration 00. Only the internal 8 Kilobyte EZ-USB RAM is
available for 8051 code and data (C&D). This mode is useful for
checking out final code, since the EZ-USB chip operates stand-
alone.
Figure 5-2: Memory Maps Based on Switches SW4-SW3
3 2K
E xt
R A M
C o de
&
D a ta
in terna l
C & D
in terna l
C & D
3 2K
E xt
R A M
C o de
&
D a ta
in terna l
C & D
3 2K
E xt
R A M
C o de
&
D a ta
3 2K
E xt
R A M
C o de
&
D a ta
in terna l
D a ta
3 2K
E xt
R A M
C o de
&
D a ta
E xt
C o de
S W 4 :O N
S W 3 :O N
(0 0 )
0 x0 00 0
0 x2 00 0
0 x8 00 0
0 xF F F F
S W 4 :O N
S W 3 :O F F
(0 1 )
S W 4 :O F F
S W 3 :O N
(1 0 )
S W 4 :O F F
S W 3 :O F F
(1 1 )
F a c to ry D e fa u lt
0 x1 B 3F
0 x7 B 3F
E A = 0
E A = 0
E A = 0
E A = 1
