RL78/G15 CHAPTER 20 ON-CHIP DEBUG FUNCTION
R01UH0959EJ0110 Rev.1.10 Page 683 of 765
Mar 7, 2023
CHAPTER 20 ON-CHIP DEBUG FUNCTION
20.1 Connecting E2, E2 Lite On-chip Debugging Emulator
The RL78 microcontroller uses the V
DD
, RESET
¯¯¯¯¯¯
, TOOL0, and V
SS
pins to communicate with the host machine via an E2,
E2 Lite on-chip debugging emulator. Serial communication is performed by using a single-line UART that uses the
TOOL0 pin.
Caution The RL78 microcontroller has an on-chip debug function, which is provided for development and
evaluation. Do not use the on-chip debug function in products designated for mass production,
because the guaranteed number of rewritable times of the flash memory may be exceeded when this
function is used, and product reliability therefore cannot be guaranteed. Renesas Electronics is not
liable for problems occurring when the on-chip debug function is used.
Figure 20-1. Connection Example of E2, E2 Lite On-chip Debugging Emulator
V
SS
TOOL0
Reset circuit
V
DD
V
DD
V
DD
TOOL0
EMV
DD
V
DD
E2, E2 Lite
target connector
V
DD
Reset signal
GND
GND
GND
Reset_out
______
RESET
Reset_out
Reset_in
470 to 570 Ω
1 kΩ
RL78/G15
8
9
2
12
14
5
10
13
6
RSTPU
4
1 kΩ
Note 1
Note 1
V
DD
Note 1. Connecting is not necessary during flash programming.
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