AT89C5122 ATMEL [ATMEL Corporation], AT89C5122 Datasheet - Page 31
AT89C5122
Manufacturer Part Number
AT89C5122
Description
MICROCONTROLLER WITH USB AND SMART CARD READER INTERFACES
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89C5122.pdf
(213 pages)
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Figure 14. AT8xC5122’s ROM Version
4202D–SCR–06/05
PROGRAM MEMORY
DATA MEMORY
(Read only)
(Read / Write)
0000
7FFF
01FF
0000
EXTRAM=0
INTERNAL
32K ROM
512 bytes
EA=1
On-chip
XRAM
Roll-Over
Roll-Over
RESET@
<0000>
FFFF
0000
FFFF
0200
01FF
8000
EXTRAM=1
EXTERNAL
EXTERNAL
EXTERNAL
EXTERNAL
RD
EA=0
XRAM
XRAM
WR
PSEN
Optional
On-Chip 256 bytes RAM
FF
80
7F
01FF
0000
00
Indirect
Addressing
128 Bytes
Upper
INTERNAL
RAM
512 Bytes
E2PROM
128 Bytes
Lower
RAM
FF
80
Direct
Addressing
Space
SFR
31
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