RL78/G1P
CHAPTER 27 ELECTRICAL SPECIFICATIONS
R01UH0895EJ0100 Rev.1.00
745
Nov 29, 2019
27.9 Timing of Entry to Flash Memory Programming Modes
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
an external reset ends
t
SU
POR and LVD reset must end before the
external reset ends.
10
s
How long the TOOL0 pin must be
kept at the low level after an
external reset ends
(excluding the processing time of
the firmware to control the flash
memory)
t
HD
POR and LVD reset must end before the
external reset ends.
1 ms
RESET
<1>
<2>
<3>
<4>
00H reception
(TOOLRxD, TOOLTxD mode)
t
SUINIT
t
SU
TOOL0
723
μ
s + t
HD
processing
time
<1> The low level is input to the TOOL0 pin.
<2> The external 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 an external reset ends (MIN. 10
s)
t
HD
: How long to keep the TOOL0 pin at the low level from when the external and internal resets end
(except software processing time)
Summary of Contents for RL78/G1P
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