Renesas RL78/D1A - Operation for Voltages and Flash Operation Modes Not Permitting Flash Memory Rewriting; Gdidis; RESET# Multiplexed Pin

E1/E20/E2/E2 Lite Additional Document 3. Notes on Usage
R20UT1994EJ0910 Rev.9.10 Page 47 of 59
Oct.06.23
3.5.2 Operation for Voltages and Flash Operation Modes Not Permitting Flash Memory Rewriting
When a voltage with which rewriting or erasure of flash memory cannot be performed has been selected or
flash programming has been disabled with the debugger's property, the following debugger operations that
accompany flash memory rewriting will cause an error in the debugger and the operations will be invalidated.
• Writing to internal flash memory
• Setting or canceling of software breakpoint
• Starting execution at the set software breakpoint position
• Stepped execution at the set software breakpoint position
• Step-over execution, Return Out execution
• Execution to the caret position
• Setting, changing, or canceling of hardware breaks
• Masking/unmasking of internal reset
• Switching of peripheral breaks
• Setting or canceling a monitoring point (extended function of the E2)
The operating frequency range and operating voltage range are set with the flash operation mode. Correct
operation may not be carried out when the operating frequency range or operating voltage range is
exceeded.
3.6 GDIDIS
The global digital input disable register (GDIDIS) is used to prevent through-current flowing from the input
buffers when the EVDD power supply is turned off (EVDD = 0 V). Since this also disables communications
through the TOOL0 pin when the E1/E20/E2/E2 Lite is in use, do not set GDIDIS to 1 (prohibiting input to the
input buffers).
3.7 RESET# Multiplexed Pin
In the RL78/G11 and the 20- and 24-pin versions of the RL78/G12, the RESET# pin has multiplexed pin
functions. Therefore, if any of the following conditions are all satisfied, control by the E1/E20/E2/E2 Lite is no
longer possible.
• The reset/port multiplexed pin is used as a port (PORTSELB = 0) due to the option byte setting (C1h).
• The option byte setting (C1h) has been rewritten during a break.
• "Yes" is selected in the [Mask INTERNAL RESET signal] property of the debugger.