at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 29

• Manufacturer Part Number: at83c5122
• Description: At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
• Manufacturer: ATMEL Corporation

Figure 13. AT8xC5122’s CRAM and E2PROM Versions
4202E–SCR–06/06
FFFF
8000
(E2PROM version)
DATA MEMORY
(Read / Write)
PROGRAM
MEMORY
(Read/Write)
INTERNAL
E2PROM
32K
Reset@
01FF
0000
<F800>
FFFF
7FFF
0000
8000
Roll-Over
EXTRAM=0
512 bytes
(Read/Write)
ENBOOT=1
(Read Only)
On-chip
INTERNAL
INTERNAL
XRAM
CRAM
ROM
32K
32K
EA = 1
Roll-Over
FFFF
0000
0200
01FF
FFFF
8000
EXTRAM=1
EXTERNAL
EXTERNAL
ENBOOT=0
EXTERNAL
PROGRAM
RD
MEMORY
XRAM
XRAM
32K
WR
PSEN
On-Chip 256 bytes RAM
Optional
(applicable only to CRAM version)
FF
80
7F
00
01FF
0000
Indirect
Addressing
128 Bytes
Reset@ <0000>
Upper
RAM
INTERNAL
512 Bytes
E2PROM
AT8xC5122/23
128 Bytes
Lower
RAM
FF
80
EA = 0
Direct
Addressing
EXTERNAL
PROGRAM
MEMORY
Space
SFR
PSEN
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