Texas Instruments TMS370 - Manual (Page 44)

Defining and Adding a Device to the Device Table
2-10
Operating in the Configuration Window
Valid types of memory are EPROM or EEPROM.
Legal V
CC
values are listed following the prompt—0, 5, or 6. If you
enter a value that is not one of the three valid choices, the following
error message appears:
invalid VCC value: 0, 5, or 6 (hit any key)
Press any key to erase the error message and return to the prompt
to enter the V
CC
value again.
Legal V
PP
values are listed following the prompt—0, 5, 12, 12.5, or
21. If you enter a value which is not one of the five choices, the follow-
ing error message appears:
invalid VPP value: 0, 5, 12, 12.5 or 21 (hit any key)
Press any key to erase the error message and return to the prompt
to enter the V
PP
value again.
Valid pdt values fall in the decimal range of 0–127 as shown at the
end of the prompt. If you enter a value that is out of the range, an error
message is displayed as follows:
invalid Program Pulse Duration time: [0..127]
Press any key to erase the error message and return to the prompt
to enter the Program Pulse Duration time again.
Step 4: Identify the secondary configuration parameters by answering the
following four prompts:
Control Register:
This parameter is necessary only for programming TMS370 micro-
controllers. The current valid values are 01Ah for the data EEPROM
range and 1Ch for the program memory range.
Family Code:
This parameter tells the programmer how to program the device. The
current valid values are:
Code Device Code Device
10h TMS370 EEPROM range 41h 2764, 27C64, SE77C42,
TMS77C82
11h TMS370 EPROM range 42h 27C128
20h TMS7742 43h 27C256
40h 2732
Block Erase:
Using the block erase parameter for devices with a family code of
10h (TMS370 EEPROM range) allows the array to be erased to 1s
or 0s. The block erase parameter is ignored for any other family code
and should be set to
none for clarity.