21 ELECTRICAL CHARACTERISTICS
S1C17M20/M21/M22/M23/M24/M25
Seiko Epson Corporation
21-7
TECHNICAL MANUAL (Rev. 1.0)
EXOSC external clock input characteristics
Unless otherwise specified: V
DD
= 1.8 to 5.5 V, V
SS
= 0 V, Ta = -40 to 85
°
C
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
EXOSC external clock duty ratio
t
EXOSCD
t
EXOSCD
= t
EXOSCH
/t
EXOSC
46
–
54
%
High level Schmitt input threshold voltage V
T+
0.5
×
V
DD
–
0.8
×
V
DD
V
Low level Schmitt input threshold voltage V
T-
0.2
×
V
DD
–
0.5
×
V
DD
V
Schmitt input hysteresis voltage
D
V
T
180
–
–
mV
EXOSC
t
EXOSCH
t
EXOSC
= 1/f
EXOSC
V
T+
V
T+
V
T-
t
EXOSCH
t
EXOSC
= 1/f
EXOSC
V
T+
V
T+
V
T-
21.6 Flash Memory Characteristics
Unless otherwise specified: V
DD
= 2.4 to 5.5 V, V
SS
= 0 V, Ta = -40 to 85
°
C
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Programming count
*
1
C
FEP
Programmed data is guaranteed to be
retained for 10 years.
1,000
–
–
times
*
1 Assumed that E Programming as count of 1. The count includes programming in the factory for shipment with ROM data
programmed.
21.7 Input/Output Port (PPORT) Characteristics
Unless otherwise specified: V
DD
= 1.8 to 5.5 V, V
SS
= 0 V, Ta = -40 to 85
°
C
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
High level Schmitt input
threshold voltage
V
T+
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D1, PD3–D4 0.5
×
V
DD
–
0.8
×
V
DD
V
Low level Schmitt input
threshold voltage
V
T-
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D1, PD3–D4 0.2
×
V
DD
–
0.5
×
V
DD
V
Schmitt input hysteresis
voltage
D
V
T
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D1, PD3–D4
180
–
–
mV
High level output current I
OH
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D4,
V
OH
= 0.9
×
V
DD
–
–
-0.5
mA
Low level output current I
OL
P00–07, P10–17, P20–27, P30–37, P40–2, PD0–D4,
V
OL
= 0.1
×
V
DD
0.5
–
–
mA
Leakage current
I
LEAK
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D4
-150
–
150
nA
Input pull-up resistance
R
INU
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D1, PD3–D4
100
200
500
k
W
Input pull-down resistance R
IND
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D1, PD3–D4
100
200
500
k
W
Pin capacitance
C
IN
P00–07, P10–17, P20–27, P30–37, P40–42, PD0–D1, PD3–D4
–
–
15
pF
High level
Low level
V
T
+
V
T
-
0
Input voltage [V]
Input data
V
DD
7.0 V
*
(
∗
For over voltage tolerant fail-safe type port)