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USB-EK01 Users Manual (Rev 1.0)
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0xFFFF
RAM32K
CODE or
XDATA
USB-IK01 Board
0x0000
(Note) Can be
programed the
location by
EPLD
programming
and DIP sw.
0x7FFF
FLASH 64K
CODE
AN2131QC Internal
0x2000
0x1B40
[Figure 4.6 When USB-IK01 and USB-EK01 combination Memory Map(EA = 0)]
If EA pin of chip is Low Level(
‘
0
’
), the program memory use a RAM of inside
AN2131 chip. But, if EA pin of chip is High Level(
‘
1
’
), it use external memory area.
In other words, it decide on whether or not there is to perform the first program to
enforce in where with EA pin input state when 8051 reset.
0xFFFF
RAM32K
CODE or
XDATA
USB-IK01 Board
0x0000
(Note) Can be
programed the
location by
EPLD
programming
and DIP sw.
0x7FFF
FLASH 64K
CODE
AN2131QC Internal
0x2000
[Figure 4.7 When USB-IK01 and USB-EK01 combination Memory Map(EA = 1)]
If EA pin of chip is High Level(
‘
1
’
), the external memory area is not affected, the
RAM of inside AN2131 chip can use general memory.