AT83C5122 Datasheet, PDF (32/213 Pages) ATMEL Corporation – MICROCONTROLLER WITH USB AND SMART CARD READER INTERFACES

AT83C5123 Version
The AT83C5123 device is a low pin count version of the AT8xC5122.
The ROM version implements :
- 30 KB of ROM mapped from 0000 to 77FF in which is embedded the user code. The
ROM device is only factory programmable.
- 512 bytes of E2PROM can be optionally implemented to store permanent data
Figure 15. AT83C5123’s Device
PROGRAM MEMORY
(Read only)
7FFF
INTERNAL
30K ROM
RESET@
<0000>
DATA MEMORY
(Read / Write)
OPTIONAL
01FF
512 Bytes
INTERNAL
E2PROM
0000
01FF
0000
On-chip
512 bytes
XRAM
On-Chip 256 bytes RAM
Indirect
Addressing
FF _Upper
128 Bytes
80 ^RAM
Direct
Addressing
FF
SFR
Space
80
7F
Lower
128 Bytes
00
RAM
32 AT8xC5122/23
4202D–SCR–06/05