at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 32

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

AT83C5123 Version
Figure 15. AT83C5123’s Device
32
PROGRAM MEMORY
(Read only)
DATA MEMORY
(Read / Write)
AT8xC5122/23
RESET@
<0000>
OPTIONAL
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
01FF
01FF
0000
0000
7FFF
INTERNAL
512 Bytes
512 bytes
INTERNAL
E2PROM
30K ROM
On-chip
XRAM
On-Chip 256 bytes RAM
FF
80
7F
00
Indirect
Addressing
128 Bytes
Upper
RAM
128 Bytes
Lower
RAM
FF
80
Direct
Addressing
Space
SFR
4202E–SCR–06/06