UM-GP-002
GreenPAK Advanced Development Platform
User Manual
Revision 2.2
21-Feb-2020
CFR0012
11 of 40
© 2020 Dialog Semiconductor
The configuration steps:
▪
close internal and open external power switch
▪
close all used expansion port switches in the software
▪
hit Emulation/Test mode button
This is the common way of using an Expansion connector.
Figure 6: Internal Power Source
2) Internal power is used to run the chip and external circuit (internal power source/sink current is
limited to 50 mA).
The configuration steps:
▪
close internal power switch
▪
close external power switch
▪
close all used expansion port switches in the software
▪
hit Emulation/Test mode button
Figure 7: Internal Power Source for GreenPAK Chip and External Development Platform
3) External power is used to run the chip and external circuit (internal source output is in Hi-Z state).
The configuration steps:
▪
open internal power switch
▪
close external power switch
▪
close all used expansion port switches in the software
▪
hit Emulation/Test mode button (External power should be applied before this step)
Note that the GreenPAK chip has internal OTP memory which is normally loaded into RAM registers
at initialization time.“Emulation mode” will bypass this load, and write the updated version of the
project directly into the RAM register inside the GreenPAK chip many times, but after power loss all
internal data will be lost. When the GreenPAK chip is already programmed the user can use
Emulation mode to load another project and test it on the emulation tool in Emulation mode, in that
case emulation data will be cleared. The “Emulation” mode is not necessary for checking
programmed parts: in this case the “Test mode” is used.
Expansion connector can be divided by types of connections:
1.
V
DD
2.
GND
3.
Data connections
The V
DD
connection enables the user to connect/disconnect external and internal power source. This
connection meets next requirements:
▪
External power range: 1.8 - 5.5 V
▪
High resistance voltage dividers are not recommended