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USB-EK01 Users Manual (Rev 1.0)
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4.2.2 USB-EK01(AN2131) Memory Map
Cypress
의
AN2131 which have a core of 8051 microcontroller is same memory
structure of 8051 internal memory. But, other point got separate RAM(8K Byte) in
the chip inside and use to program and data memory.
Also, the RAM can use a EndPoint buffer in case of USB data transmission,
therefore, the driver write a program in this RAM area when first Power ON reset
and can make it so that a program operates that user wanted it.
The USB-EK01 board doesn
’
t have special external memory (RAM/ROM), it is
same structure of memory map like AN2131 chip.
0xFFFF
XDATA/
CODE
6,976 Bytes
EA = 0
AN2131QC Internal
IDATA
REGs
SFR
BDATA
DATA
0x0000
REGs/Buffers
DATA
REGs/Buffers
0x1B3F
0x1B40
0x1FFF
0x2000
0x27FF
0x7B40
0x7FFF
16x64
Bulk
End points
(1024 Bytes)
USB control
registers
192 Bytes
[Figure 4.4 USB-EK01(AN2131) Memory Map]
But, if the USB-EK01 board use an expansion connector and it connect with USB-
IK01, the board can use external memory area.