Datasheet

RL78/L12
CHAPTER 31 ELECTRICAL SPECIFICATIONS (G: TA = -40 to +105°C)
R01UH0330EJ0200 Rev.2.00 961
Dec 13, 2013
31.11 Timing Specifications for Switching Flash Memory Programming Modes
(TA = −40 to +105°C, 2.4 V ≤ EVDD = VDD ≤ 5.5 V, VSS = EVSS = 0 V)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
Time to complete the communication
for the initial setting after the
external reset is released
t
SUINIT
POR and LVD 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
POR and LVD reset must be released before
the external reset is released.
10 μ s
Time to hold the TOOL0 pin at the
low level after the external reset is
released
(excluding the processing time of the
firmware to control the flash
memory)
t
HD
POR and LVD reset must be released before
the external reset is released.
1 ms
RESET
TOOL0
<1>
<2>
<3
>
t
SUINIT
t HD +
soft processing
time
t SU
<4>
1-byte data for mode setting
<1> The low level is input to the TOOL0 pin.
<2> The external reset is released (POR and LVD reset must be released before the external
reset is released.).
<3> The TOOL0 pin is set to the high level.
<4> Setting of the flash memory programming mode by UART reception and complete the baud
rate setting.
Remark t
SUINIT: Communication for the initial setting must be completed within 100 ms after the external reset is released
during this period.
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 (excluding the processing
time of the firmware to control the flash memory)