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14-pin 2.54mm JTAG Converter
Ordering code
IASAM34MPCPIN14
If your target features 14-pin 2.54mm pitch JTAG target debug connector, use 14-pin 2.54 mm
JTAG Converter which acts as a pinout converter. It must be ordered separately. The converter is
used only in conjunction with solutions supporting MPC5xxx/SPC5 Aurora trace interface (e.g.
MPC5x/SPC5x Aurora Active Probe).
The following pinout is valid on the target side:
Signal Direc-
tion
Signal Descrip-
tion
Signal
Pin
Pin
Signal
Signal Descrip-
tion
Signal Direction
O
JTAG
TDI
1
2
GND
Ground
I
JTAG
TDO
3
4
GND
Ground
O
JTAG
TCK
5
6
GND
Ground
O (not used)
Nexus Event In-
put
EVTI(EVTI0)
7
8
nPORESET
Power On Re-
set
O
IO
Reset
nRESET
9
10
TMS
JTAG
O
I
Reference
Voltage
Vref
11
12
GND
Ground
Not Connected
NC
13
14
nJCOMP
JTAG TRST (op-
tional)
O
14-pin 2.54mm MPC5xxx/SPC5 pinout
Signal Direction is described from the BlueBox perspective.
Mandatory pins on the microcontroller side are GND, VDD, RESET, TMS, TDI, TDO and TCK.
The JCOMP is an optional pin. Some microcontrollers don’t have this pin. Internally, this is actually
the JTAG TRST, which resets the JTAG TAP state machine. Because the JTAG TAP state machine
can be reset also by the TMS and the TCK, this pin is optional also for the debugger. If the micro-
controller has the JCOMP pin but it is not connected to the target debug connector, it must be set
to the non-active state in the target via a pull-up resistor. If not, then the JTAG TAP state machine
remains in reset and debugging is not possible.
