R5F110ME datasheet(86/153 Pages) RENESAS

86 / 153 page

RL78/L1C

2. ELECTRICAL SPECIFICATIONS (A: TA = -40 to +85 °C)

R01DS0192EJ0200 Rev. 2.00

Page 86 of 149

Feb 21, 2014

2.12

Timing Specs for Switching Modes

<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

tSUINIT: The segment shows that it is necessary to finish specifying the initial communication settings within 100 ms from

when the resets end.

tSU:

How long from when the TOOL0 pin is placed at the low level until a external reset ends

tHD:

How long to keep the TOOL0 pin at the low level from when the external and internal resets end (except soft

processing time)

(TA = -40 to +85 °C, 1.8 V  VDD  3.6 V, VSS = 0 V)

Parameter

Symbol

Conditions

MIN.

TYP.

MAX.

Unit

How long from when an external reset ends until the

initial communication settings are specified

tSUINIT

POR and LVD reset must end

before the external reset ends.

100

How long from when the TOOL0 pin is placed at the

low level until an external reset ends

tSU

POR and LVD reset must end

before the external reset ends.

s

Time to hold the TOOL0 pin at the low level after an

external reset is released (excluding the processing

time of the firmware to control the flash memory)

tHD

POR and LVD reset must end

before the external reset ends.

1ms

RESET

TOOL0

<1>

<2>

<3>

tSU

<4>

tSUINIT

723 µs + tHD

processing

time

00H reception

(TOOLRxD, TOOLTxD mode)

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