Download Combi-Modul 515

COMBImodul-515
3.1 Memory Models
The COMBI-Modul 515 allows for flexible address decoding which
can be adjusted by software to different memory models. A hardwarereset activates a default memory configuration that is suitable for a
variety of applications. However, this memory model can be changed
or adjusted at the beginning of a particular application.
Configuration of the memory is done within the address decoder by
means of 4 decoder internal registers: two control registers, one address register and one mask register. All registers are carried out as
write-only registers with access through the controller’s XDATA
memory space. There are two distinct address areas - selectable by
means of the bit IO-SW in Control Register 1 - by which the registers
can be accessed (refer to the description of the bit IO-SW below). Due
to a lack of read access, a copy of all register contents should be
maintained within the application. Reserved bits may not be changed
during the writing of the register; contents must remain at 0. A hardware-reset erases all registers while preserving the configuration of
the default memory model.
Attention:
In the event that you use FlashTools – PHYTEC’s proprietary firmware allowing convenient on-board Flash programming - the address
FA16 is preset at the start of your application software (refer to section 3.2 “”). This is to be noted upon installation of the software copy
of the register contents.
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 PHYTEC Elektronik GmbH 2000
L-335e_2