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23 ELECTRICAL CHARACTERISTICS
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
IOSC oscillation frequency-temperature characteristic
V
= 1.8 to 5.5 V, PWGACTL.REGSEL bit = 1, Typ. value
DD
9
8
7
6
5
4
3
2
1
0
-50
-25
0
23-6
= 1.8 to 5.5 V, V
= 0 V, Ta = -40 to 85°C
SS
Symbol
t
staI
f
CLGIOSC.IOSCFQ[1:0] bits = 0x2,
IOSC
PWGACTL.REGSEL bit = 1
CLGIOSC.IOSCFQ[1:0] bits = 0x1,
PWGACTL.REGSEL bit = 1
CLGIOSC.IOSCFQ[1:0] bits = 0x0,
PWGACTL.REGSEL bit = 1
CLGIOSC.IOSCFQ[1:0] bits = 0x1,
PWGACTL.REGSEL bit = 0
CLGIOSC.IOSCFQ[1:0] bits = 0x0,
PWGACTL.REGSEL bit = 0
CLGIOSC.IOSCFQ[1:0] bits = 0x2
0x1
0x0
25
50
75
100
Ta [°C]
Seiko Epson Corporation
Condition
V
= 1.8 to 5.5 V, PWGACTL.REGSEL bit = 0, Typ. value
DD
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
-50
-25
0
Min.
Typ.
Max.
–
–
3
7.2
8
8.4
1.8
2
2.1
0.9
1
1.05
1.62
1.8
1.89
0.78
0.9
1.02
CLGIOSC.IOSCFQ[1:0] bits = 0x1
0x0
25
50
75
100
Ta [°C]
S1C31D41 TECHNICAL MANUAL
(Rev. 1.1)
Unit
µs
MHz
MHz
MHz
MHz
MHz
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