The Ada-Mipi20-Ti14 Adapter - IAR SYSTEMS I-jet User Manual

I-jet
Pin Name
direction
VTref Input Voltage Target
Reference
nSRST I/O System Reset
Vsupply Output --
DBGRQ Output --
DBGAC Output Target Power
K/TRGP
WR
Table 6: ARM-20 pin definitions
The R2 pull-down on pin 17 of the I-jet MIPI20 connector is a signal to the I-jet that a
legacy ARM-20 adapter is being used. Other adapters will have different resistors so that
I-jet can identify them if needed. A solid GND on this pin means no adapter is being
used and the MIPI cable is connected directly between the I-jet and the target board.
ARM-20 header information (for target board)
The ARM-20 header is manufactured by Tyco Electronics. The part number is
103308-5. For more information, see the manufacturer's web page
http://www.te.com/catalog/pn/en/103308-5?RQPN=103308-5

THE ADA-MIPI20-TI14 ADAPTER

The ADA-MIPI20-TI14 adapter adapts the I-jet standard MIPI-20 cable pinout to the
Texas Instruments 14-pin JTAG interface used on many OMAP, DaVinci, and other
TMS320, TMS470, and TMS570 target boards.
Technical specifications
Description
This is the target reference voltage. It indicates that
the target has power. VTref is normally fed from Vdd
on the target hardware and might have a series
resistor (though this is not recommended).
VTref is used by I-jet to detect if target power is
active and to set JTAG signal voltage reference for
level translators.
Active LOW open-collector signal that is driven by
I-jet to reset the device and/or the target board.
I-jet senses this line to determine when you have
reset the device.
This pin is not connected to I-jet.
This pin is not connected on I-jet.
This pin is used under SW control to supply 5 V
power to the target board. It should be routed
through a jumper shunt to the 5 V DC board input to
eliminate the power adapter during debugging. The
maximum current supplied by I-jet on this pin is
about 420 mA. When the current supplied reaches
~500 mA, the power will be shut down for
protection.
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