Renesas RL78/G1P Hardware User Manual page 692

RL78/G1P
23.2.2 Communication mode
Communication between the external device and the RL78/G1P is established by serial communication using the
TOOLTxD and TOOLRxD pins via the dedicated UART of the RL78/G1P.
Transfer rate: 1 M, 500 k, 250 k, 115.2 kbps
External device
(such as microcontroller
Note Connect REGC pin to ground via a capacitor (0.47 to 1
The external device generates the following signals for the RL78/G1P.
Signal Name
V I/O
DD
GND
RESETOUT Output
RxD Input
TxD Output
PORT Output
Note Connect REGC pin to ground via a capacitor (0.47 to 1
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
Figure 23-4. Communication with External Device
V
DD
GND
RESETOUT
RxD
TxD
PORT
and ASIC)
Table 23-3. Pin Connection
External Device
I/O
V voltage generation/power monitoring
DD

Ground
Reset signal output
Receive signal
Transmit signal
Mode signal
V
DD
V /REGC
SS
RESET
TOOLTxD
TOOLRxD
TOOL0

F).
Pin Function

F).
CHAPTER 23 FLASH MEMORY
Note
RL78/G1P
RL78/G1P
Pin Name
V
DD
V , REGC Note
SS
RESET
TOOL0TxD
TOOL0RxD
TOOL0
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