Atmel AT89STK-06 Guía de usuario Pagina 12

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Hardware Description
AT89STK-03 Hardware User Guide 2-9
7609B–SCR–11/06
2.4.7 EEPROM Settings 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.
Refer to bootloader datasheets for further information.
2.5 2 x 48 headers
These headers support the optional C51 generic board.
Table 2-2. E2PROM settings
Configuration of the board
Bootloader
DPW DRV DSU
Jumper on A0 Yes No No
Jumper on A1 No No No
Jumper on P36 Yes No No
Jumper on P37 Yes No No
Jumper on P42 Yes No No
Jumper on P43 Yes No No
Solder gout on SW18 No Yes Yes
Solder gout on SW26 No Yes Yes
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