E1/E20/E2/E2 Lite Additional Document
R20UT1994EJ0900 Rev.9.00
Page 21 of 58
Jan.20.22
2.4.2
Connection between the 14-Pin Connector and the RL78 Family MCUs (Only the RL78/G11
and the 20- and 24-Pin Versions of the RL78/G12)
Figure 2-6 shows a recommended circuit for connection between the 14-pin connector and the RL78 family
MCUs (only the RL78/G11 and the 20- and 24-pin versions of the RL78/G12).
MCU
8
VSS
VDD
9
2,12,14
1,3,7,11
5
TOOL0
TOOL0
EMVDD
VDD
VSS
R.F.U
470 to 510
W
1 k
W
6
10,13
RESET_IN
RESET_OUT
RESET#
1 k
W
4
RSTPU
VDD
VDD
Note 1
Note 2
14-pin
2.54-mm pitch
connector
Note 4
Note 3
Note 3
Note 3
Reset circuit
Note 5
Note 3 Note 6
Figure 2-6 Example of Connection between the 14-Pin Connector and the RL78 Family MCUs
(Only the RL78/G11 and the 20- and 24-Pin Versions of the RL78/G12)
Notes:
1
The circuits and resistance values listed are recommended but not guaranteed. Determine the
circuit design and resistance values by taking into account the specifications of the target device
and noise. For flash programming for mass production, perform sufficient evaluation about
whether the specifications of the target device are satisfied.
2
For processing of pins not used by the E1/E20/E2/E2 Lite, refer to the hardware manual for the
device.
3
The recommended circuit for the RESET# pin differs depending on whether the multiplexed
functions are used. For details on how to handle the RESET# pin, also refer to section 2.5, Notes
on Connection.
4
The RESET_IN and RSTPU pins are used only in debugging. The emulator operates for flash
programming by the programming software whether this pin is connected or not.
5
Securely connect pins 2, 12, and 14 of the connection to GND of the user system. These pins
are used for electrical grounding as well as for monitoring of connection with the user system by
the E1/E20/E2/E2 Lite.
6
Securely connect both pin 10 and pin 13.
