iSYSTEM, October 2016
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14-pin 2.54mm Renesas RL78 Serial Cable Adapter
Ordering code
IC50175
This adapter is used to connect the iC5000 / iC5500 / iC6000 development system to Renesas RL78 based target
via Serial debug interface. It connects to Debug/Trace module on one side and to the target debug connector on
the other side. It can be used for targets featuring 14-pin 2.54 pitch target debug connector with RL78 pinout.
The following pinout is valid on the target side:
Signal
direction
Signal description
Signal
Pin Pin
Signal
Signal description
Signal
direction
Not Connected
NC
1
2
GND
Ground
Not Connected
NC
3
4
NC
Not Connected
I/O
Communication line
TOOL0
5
6
RESET_IN
Reset In
I
Not Connected
NC
7
8
VDD
Power supply pin
Power supply pin
EVDD
9
10 RESET_OUT
Reset Out
O
Not Connected
NC
11 12
GND
Ground
O
Reset Out
RESET_OUT 13 14
GND
Ground
14-pin Renesas RL78 Serial Debug target pinout
If the ‘Supply 5V to the target’ option is checked in the ‘Hardware/Emulation Options/CPU Setup/Advanced’
tab, the debugger supplies 5V at VDD pin (pin 8) of the target debug connector, which can be used to power the
target. Maximum target current consumption should not exceed 50mA.
Some RL78 devices may have two power supply pins (EVDD and VDD). Both must be connected to debug
connector.
If ‘Vref’ option for Debug I/O levels is checked in the ‘Hardware/Emulation Options/Hardware’ tab the EVDD
on pin 9 is used as TAR-VREF.
Note: If ‘RESET IN’ (target reset detection) is not connected to the target debug connector, make sure that 10k
pull up is connected to this pin (target debug connector pin 6) or the debugger may exhibit unpredictable
behavior.
The adapter connects to the target via a 14-pin 2.54 mm connector (for example Yamaichi: FAS-1401-2101-2-
OBF). A target should feature a matching part (for example WÜRTH ELEKTRONIK: 612 014 216 21).
