System Reset Controller (Src) Characteristics - Epson S1C31W74 Technical Manual

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/BOR characteristics
Unless otherwise specified: V
DD
Item
POR/BOR canceling voltage
POR/BOR detection voltage
POR/BOR hysteresis voltage
POR/BOR detection response time
POR/BOR operating limit voltage
POR/BOR reset request hold time
V
DD
V OP
RST
V
SS
POR&BOR
X REQ
reset request
t
RRQ
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.
23-4
= 1.8 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-
= 1.8 to 3.6 V, V = 0 V, Ta = -40 to 85 °C
SS
Symbol
V
RST+
V
RST-
DV
RST
t
RST
V OP
RST
t
RRQ
t t
RST RST
V
V V
RST- RST-
REQ
t
= 1.8 to 3.6 V, V = 0 V, Ta = -40 to 85 °C
SS
Symbol
t
RSTR
Seiko Epson Corporation
Condition
t
SR
Condition
t
RST
RST+
V
RST-
V
RST
RRQ
X
Indefinite (operating limit)
Condition
Min. Typ. Max.
0.5 × V – 0.8 × V
DD
0.2 × V – 0.5 × V
DD
180 – –
100 270 500
– – 15
5 – –
V
T+
Min. Typ. Max.
1.41 – 1.75
1.25 – 1.55
40 60 –
– – 20
– 0.5 0.95
0.01 – 4
V
RST+
OP V OP
RST
X REQ
t
RRQ
REQ
POR/BOR reset request
DD
Min. Typ. Max.
– – 150
S1C31W74 TECHNICAL MANUAL
Unit
V
DD
V
DD
mV
kW
pF
µs
Unit
V
V
mV
µs
V
ms
X
voltage
Unit
µs
(Rev. 1.1)