RL78/G15 CHAPTER 24 ELECTRICAL SPECIFICATIONS (T
A
= −40 to +105°C, TA = −40 to +125°C)
R01UH0959EJ0110 Rev.1.10 Page 752 of 765
Mar 7, 2023
24.10 Timing of Entry to Flash Memory Programming Mode
[T
A
= −40 to +105°C: G products, T
A
= −40 to +125°C: M products, 2.4 V ≤ V
DD
≤ 5.5 V, V
SS
= 0 V]
Item Symbol Condition MIN. TYP. MAX. Unit
Time to complete the communication
for the initial setting after the external
reset is released
t
SUINIT
The SPOR reset must be released
before the external reset is released.
100 ms
Time to release the external reset
after the TOOL0 pin is set to the low
level
t
SU
The SPOR reset must be released
before the external reset is released.
10 µs
Time to hold the TOOL0 pin at the low
level after the external reset is
released
t
HD
The SPOR reset must be released
before the external reset is released.
1 ms
______
RESET
TOOL0
<
1>
<2>
<3
>
t
SUINIT
t
HD
1
-
byte data for setting mode
t
SU
<
4>
•
•
•
<1> The low level is input to the TOOL0 pin.
<2> The external reset is released (the SPOR reset must have been released before that).
<3> The TOOL0 pin is released from the low level.
<4> Setting of entry to the flash memory programming mode by UART reception is completed.
Remark t
SUINIT
: During this period, the communications for the initial setting must be completed within 100 ms after
release from the reset.
t
SU
: Time to release the external reset after the TOOL0 pin is set to the low level
t
HD
: Time to hold the TOOL0 pin at the low level after the external reset is released
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