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8.6
DEVRAM
The DEVRAM tab is set up only for individual register read/writes, without the use of the grid. When this
tab is displayed, the READ SELECTED / READ ALL and WRITE SELECTED / WRITE ALL buttons
perform the same operations, respectively. The DEVRAM tab also contains buttons used to load a .HEX
8051 program file into the 8051 MCU in the PGA450-Q1 device.
The process of loading the .HEX file into the DEVRAM is identical to that of OTP.
For a pristine IC that has never been programmed (OTP Status reads "OTP Empty"), in order to run
software from DEVRAM, the OTP memory must be programmed with some specific instructions to redirect
the 8051 µP to DEVRAM. This must only be done once. To do this, check the "Program OTP Memory
Also" button, and the GUI will program the OTP with this jump statement as well as program the DEVRAM
with the selected HEX file.
Note that OTP programming may be required if the interrupt vectors are not programmed
Figure 8. OTP Memory can be programmed while programming the Development RAM
SLDU007C – March 2012 – Revised November 2015
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Controlling the PGA450-Q1 Memory Spaces With the GUI
Copyright © 2012–2015, Texas Instruments Incorporated
PGA450Q1EVM User's Guide
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