Memory Mapping
7-5
Defining a Memory Map
When a programming operation is started, it must be finished; the EXE bit must
be reset at least 10 or 20 ms (depending on the operation) after its rising edge.
Otherwise, the CPU is halted and an the following error message is displayed:
EEPROM VIOL
Since the data EEPROM memory is emulated through a simple RAM, all writ-
ten data are retained as long as the CDT370 is powered; they are lost when
it is switched-off.
In all other respects, the CDT370 behaves exactly as if you were programming
actual data EEPROM with a TMS370 device. Refer to
Programming the Data
EEPROM in the TMS370 Family Data Manual for complete instructions.
Mapping Attributes Data EEPROM memory must always be mapped as
DEEPROM; you can define only one DEEPROM. You must not define any
EPROM control frame (EPCTL) when you define a DEEPROM. An EPCTL is
automatically created (address 0x1010, length 0x10); any frame that may
have existed at this address must be deleted first. The EPCTL is automatically
deleted when the DEEPROM is deleted.
Note:
Unsupported EEPROMS
Program EEPROM (PEEPROM) and Custom EEPROM (CEEPROM) are
not supported.
Summary of Contents for CDT370
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