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RL78/G1A
CHAPTER 30 ELECTRICAL SPECIFICATIONS (G: INDUSTRIAL APPLICATIONS T
A
=
−
40 to +105
°
C)
R01UH0305EJ0200 Rev.2.00 951
Jul 04, 2013
30.10 Timing Specs for Switching Flash Memory Programming Modes
(T
A = −40 to +105°C, 2.4 V ≤ EVDD0 ≤ VDD ≤ 3.6 V, VSS = EVSS0 = 0 V)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
How long from when an external reset
ends until the initial communication
settings are specified
t
SUINIT
POR and LVD reset must end before the
external reset ends.
100 ms
How long from when the TOOL0 pin is
placed at the low level until a external
reset ends
t
SU
POR and LVD reset must end before the
external reset ends.
10
μ
s
How long the TOOL0 pin must be kept at
the low level after an external reset ends
(except flash firmware processing time)
t
HD
POR and LVD reset must end before the
external reset ends.
1 ms
RESET
TOOL0
<1> <2> <3>
t
SUINIT
00H reception
(TOOLRxD, TOOLTxD mode)
t
SU
<4>
723 μs + t
HD
process time
<1> The low level is input to the TOOL0 pin.
<2> The pins reset ends (POR and LVD reset must end before the external reset ends.).
<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: The segment shows that it is necessary to finish specifying the initial communication settings within 100
ms from when the resets end.
t
SU: How long from when the TOOL0 pin is placed at the low level until a external reset ends
t
HD: How long to keep the TOOL0 pin at the low level from when the external resets end (except flash
firmware processing time)
<R>
<R>
<R>