System Reset Controller (Src) Characteristics; Clock Generator (Clg) Characteristics - Epson S1C17M20 Technical Manual

21 ELECTRICAL CHARACTERISTICS

21.4 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.

21.5 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
21-4
= 1.8 to 5.5 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 5.5 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
RRQ
= 1.8 to 5.5 V, V = 0 V, Ta = -40 to 85°C
SS
Symbol
t
RSTR
= 1.8 to 5.5 V, V = 0 V, Ta = -40 to 85°C
SS
Symbol Condition
t I
sta
f
IOSC
Seiko Epson Corporation
Condition
t
SR
Condition
t
RST
RST+
V
RST-
V
X
Indefinite (operating limit)
Condition
Ta
25°C
-40 to 85°C
Min. Typ. Max.
0.5 × V – 0.8 × V
DD DD
0.2 × V – 0.5 × V
DD DD
180 – –
100 230 500
– – 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 RST
X REQ
t
RRQ
REQ
POR/BOR reset request
DD
Min. Typ. Max.
0.5 – 1.7
Min. Typ. Max.
– – 3
679 700 721
651 700 749
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)
Unit
V
V
mV
kW
pF
µs
Unit
V
V
mV
µs
V
ms
X
voltage
Unit
ms
Unit
µs
kHz
kHz