E1/E20/E2/E2 Lite Additional Document 2. Designing the User System
R20UT1994EJ0910 Rev.9.10 Page 26 of 59
Oct.06.23
Figure 2-9 Connection Example 1 of RESET#
(RL78 Family MCUs in General)
14-pin
2.54-mm pitch
connector
MCU
Reset circuit
6
10,13
RESET_IN
RESET_OUT
RESET#
<Connection Example of RESET for RL78 Family MCUs in General>
(A jumper is used to switch connection to the E1/E20/E2 Lite.)
A
B
C
When E1/E20/E2/E2 Lite is connected: B-C shorted
When E1/E20/E2/E2 Lite is not connected: A-B shorted
14-
pin
2
.54-
mm pitch
connector
MCU
6
10,13
RESET_IN
RESET_OUT
RESET#
VDD
<Connection Example of RESET for RL78 Family MCUs in General>
(The power-on reset circuit is the only reset circuit on the user system.)
1 k to 10 kΩ
Figure 2-10 Connection Example 2 of RESET#
(RL78 Family MCUs in General)
Figure 2-11 Connection Example 3 of RESET#
(RL78 Family MCUs in General)
470 to 510 Ω
1 kΩ
Reset ci rcui t
6
10,13
RESE T_IN
RESE T_OUT
4
RSTPU
Note 1
14-pin
2. 54-m m pitch
con ne ctor
M CU
RESE T#
<Con ne cti on Exam p le of RESE T w he n t he Targe t MCU is
th e R L 78/ G11 , 20- an d 24-Pin
Versions of th e RL7 8/ G12 or a n R L 78 /I1C with th e B atte ry Ba ckup Funct ion not i n Use >
(Re commen ded Circu it)
Note 1: The em u la tor o pe rates for fla sh p rogr a mming by t he pr og ra mming so ftw are
whe the r this p in is co nn ecte d o r no t.
Note 2
Note 2: C on ne cti on is un nece ssary wh en the re is n o rese t ci rcuit o n t he use r system.
14-pi n
2. 54-m m pitc h
conne ctor
M CU
6
10,13
RESE T_IN
RESE T_OUT RESE T#
4
RSTPU
Exte rnal circuit
1 kΩ
<Con ne cti on Examp le of RESE T fo r th e RL 78/ G11 an d 20- an d 24-Pin Ve rsion s of th e RL7 8/ G12 >
(whe n u sing a function which is multiplexed with RESET#
)
Figure 2-12 Connection Example 1 of RESET#
(when the Target MCU is the RL78/G11, 20- and 24-
Pin Versions of the RL78/G12 or an RL78/I1C with the
Battery Backup Function not in Use)
Figure 2-13 Connection Example 2 of RESET#
(the RL78/G11 and 20- and 24-Pin Versions of the
RL78/G12)
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