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23 ELECTRICAL CHARACTERISTICS
23.4 System Reset Controller (SRC) Characteristics
#RESET pin characteristics
Unless otherwise specified: V
DD
Item
High level Schmitt input threshold voltage V
Low level Schmitt input threshold voltage
Schmitt input hysteresis voltage
Input pull-up resistance
Pin capacitance
Reset Low pulse width
POR characteristics
Unless otherwise specified: V
DD
Item
POR operating limit voltage
POR reset request hold time
V
DD
POR reset
request
Note: When performing a power-on-reset again after the power is turned off, decrease the V
to V
OP or less.
RST
Reset hold circuit characteristics
Unless otherwise specified: V
DD
Item
Reset hold time
*1
*1 Time until the internal reset signal is negated after the reset request is canceled.
23.5 Clock Generator (CLG) Characteristics
Oscillator circuit characteristics including resonators change depending on conditions (board pattern, components
used, etc.). Use these characteristic values as a reference and perform matching evaluation using the actual printed
circuit board.
IOSC oscillator circuit characteristics
Unless otherwise specified: V
DD
Item
Oscillation start time
Oscillation frequency
23-4
= 1.2 to 3.6 V, V
= 0 V, Ta = -40 to 85 °C
SS
Symbol
T+
V
T-
DV
T
R
IN
C
IN
t
SR
#RESET
V
T-
= 1.2 to 3.6 V, V
= 0 V, Ta = -40 to 85 °C
SS
Symbol
V
OP
RST
t
RRQ
V
OP
RST
V
SS
REQ
X
t
RRQ
X
Indefinite (operating limit)
= 1.2 to 3.6 V, V
= 0 V, Ta = -40 to 85 °C
SS
Symbol
t
RSTR
= 1.2 to 3.6 V, V
= 0 V, Ta = -40 to 85 °C
SS
Symbol
Condition
t
I
sta
f
IOSC
Seiko Epson Corporation
Condition
Min.
0.5 × V
0.2 × V
20
100
t
SR
V
Condition
Min.
0.01
REQ
POR reset request
Condition
Min.
0.5
V
Ta
Min.
DD
25 °C
679
1.6 to 3.6 V
665
1.2 to 1.6 V
1.6 to 3.6 V -40 to 85 °C
651
630
1.2 to 1.6 V
Typ.
Max.
–
0.8 × V
DD
DD
–
0.5 × V
DD
DD
–
–
270
500
–
–
15
5
–
–
T+
Typ.
Max.
–
0.5
0.95
–
4
voltage
DD
Typ.
Max.
–
0.9
Typ.
Max.
–
–
3
700
721
700
735
700
749
700
770
S1C17W18 TECHNICAL MANUAL
(Rev. 1.2)
Unit
V
V
mV
kW
pF
µs
Unit
V
ms
Unit
ms
Unit
µs
kHz
kHz
kHz
kHz
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