RL78/G13 CHAPTER 26 ON-CHIP DEBUG FUNCTION
R01UH0146EJ0100 Rev.1.00 952
Sep 22, 2011
CHAPTER 26 ON-CHIP DEBUG FUNCTION
26.1 Connecting E1 On-chip Debugging Emulator to RL78/G13
The RL78/G13 uses the V
DD, RESET, TOOL0, and VSS pins to communicate with the host machine via an E1 on-chip
debugging emulator. Serial communication is performed by using a single-line UART that uses the TOOL0 pin.
Caution The RL78/G13 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 26-1. Connection Example of E1 On-chip Debugging Emulator and RL78/G13
E1 target connector
Note 2
Note 1
V
DD
TOOL0
V
DD
Reset circuit
Reset signal
GND
GND GND
GND
TOOL0
RESET
RESET
RESET
TRESET
V
DD
V
DD
V
DD
/EV
DD
V
DD
/EV
DD
10 kΩ
1 kΩ
1 kΩ
RL78/G13
V
DD
EV
DD
EV
DD
EMV
DD
Notes 1. Connecting the dotted line is not necessary during flash programming.
2. If the reset circuit on the target system does not have a buffer and generates a reset signal only with
resistors and capacitors, this pull-up resistor is not necessary.
Caution This circuit diagram is assumed that the reset signal outputs from an N-ch O.D. buffer (output
resistor: 100 Ω or less)
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