Datasheet

RL78/L12 CHAPTER 26 FLASH MEMORY
R01UH0330EJ0200 Rev.2.00 810
Dec 13, 2013
The dedicated flash memory programmer generates the following signals for the RL78 microcontroller. See the manual
of PG-FP5, FL-PR5, or E1 on-chip debugging emulator for details.
Table 26-2. Pin Connection
Dedicated Flash Memory Programmer RL78 microcontroller
Signal Name I/O Pin Function Pin Name
PG-FP5,
FL-PR5
E1 on-chip
debugging
emulator
VDD I/O VDD voltage generation/power monitoring VDD
GND
−
Ground
V
SS, EVSS, REGC
Note
EMVDD
−
Driving power for TOOL0 pin VDD, EVDD
/RESET
−
Output Reset signal RESET
−
RESET Output
−
TOOL0 I/O Transmit/receive signal TOOL0
SI/RxD
−
I/O Transmit/receive signal
Note Connect REGC pin to ground via a capacitor (0.47 to 1 μ F).
Caution Pins to be connected differ with the product. For details, see Table 26-1.
26.2 Writing to Flash Memory by Using External Device (that Incorporates UART)
On-board data writing to the internal flash memory is possible by using the RL78 microcontroller and an external device
(a microcontroller or ASIC) connected to a UART.
On the development of flash memory programmer by user, refer to the RL78 Microcontrollers (RL78 Protocol A)
Programmer Edition Application Note (R01AN0815).
26.2.1 Programming Environment
The environment required for writing a program to the flash memory of the RL78 microcontroller is illustrated below.
Figure 26-3. Environment for Writing Program to Flash Memory
RL78
microcontroller
External device
(such as microcontroller
and ASIC)
EV
DD, VDD
EVSS, VSS
RESET
UART (TOOLTxD, TOOLRxD)
TOOL0
Processing to write data to or delete data from the RL78 microcontroller by using an external device is performed on-
board. Off-board writing is not possible.
<R>
<R>
<R>