Eeprom Settings; X 48 Headers - Atmel AT89STK-03 Hardware User's Manual

2.4.7

EEPROM Settings

2.5

2 x 48 headers

AT89STK-03 Hardware User Guide
This MCU demonstration board supports different versions of the AT8XC5122 and
AT83C23 microcontrollers:
- Flash versions
- CRAM versions
- ROM versions
and different versions of embedded bootloaders (DPW, DRV, DSU).
PLCC68 package is only available in CRAM version but it possible to have it function in
flash mode by adding an external 256Kb (32KB x 8) E2PROM on the 8 pin DIP socket. It
is possible to write protect the E2PROM by adding a jumper on the WP location.
The demonstration board is configured to work with parts implementing the latest ver-
sion of the bootloader (DSU or upper versions). If parts implementing older versions are
used, headers must be added on A0 ,A1, P36, P37, P42, P43 locations and the configu-
ration of the board must changed accordingly.
Table 2-2. E2PROM settings
Configuration of the board
Jumper on A0
Jumper on A1
Jumper on P36
Jumper on P37
Jumper on P42
Jumper on P43
Solder gout on SW18
Solder gout on SW26
Refer to bootloader datasheets for further information.
These headers support the optional C51 generic board.
Bootloader
DPW DRV
Yes No
No No
Yes No
Yes No
Yes No
Yes No
No Yes
No Yes
Hardware Description
DSU
No
No
No
No
No
No
Yes
Yes
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