E0C63557
● Oscillation Characteristics
The oscillation characteristics change depending on the conditions (components used, board pattern, etc.). Use the follow-
ing characteristics as reference values.
OSC1 Crystal Oscillation Circuit
(Unless otherwise specified: VDD=3.0V, VSS=0V, fOSC1=32.768kHz, CG=25pF, CD=built-in, Ta=-20 to 70°C)
Characteristic
Oscillation start voltage
Oscillation stop voltage
Built-in capacitance (drain)
Frequency/voltage deviation
Frequency/IC deviation
Frequency adjustment range
Harmonic oscillation start voltage Vhho
Symbol
Vsta
Vstp
CD
∆f/∆V VDD=2.2 to 5.5V
∆f/∆IC
Condition
Min.
2.2
2.2
Typ.
Max. Unit
(
)
t
t
sta≤3sec VDD
V
V
pF
(
)
stp≤10sec VDD
Including the parasitic capacitance inside the IC (in chip)
14
10
10
ppm
ppm
ppm
V
-10
10
5.5
200
∆f/∆CG CG=5 to 25pF
20
(
)
CG=5pF VDD
Between OSC1 and VSS
Permitted leak resistance
Rleak
MΩ
OSC3 Ceramic Oscillation Circuit
(Unless otherwise specified: VDD=3.0V, VSS=0V, Ceramic oscillator: 3.58MHz, CGC=CDC=30pF, Ta=-20 to 70°C)
Characteristic
Oscillation start voltage
Oscillation start time
Symbol
Vsta (VDD
Condition
Min.
2.2
Typ.
Max. Unit
V
)
t
sta
V
DD=2.2 to 5.5V
5
mS
V
Oscillation stop voltage
Vstp (VDD
)
2.2
● Serial Interface AC Characteristics
Clock Synchronous Master Mode
• During 32 kHz operation
(Condition: VDD=3.0V, VSS=0V, Ta=25°C, VIH1=0.8VDD, VIL1=0.2VDD, VOH=0.8VDD, VOL=0.2VDD
)
Characteristic
Transmitting data output delay time
Receiving data input set-up time
Receiving data input hold time
Symbol
Min.
Typ.
Max.
5
Unit
µS
µS
t
t
t
smd
sms
smh
10
5
µS
• During 1 MHz operation
(Condition: VDD=3.0V, VSS=0V, Ta=25°C, VIH1=0.8VDD, VIL1=0.2VDD, VOH=0.8VDD, VOL=0.2VDD
)
Characteristic
Transmitting data output delay time
Receiving data input set-up time
Receiving data input hold time
Symbol
Min.
Typ.
Max.
200
Unit
nS
nS
t
t
t
smd
sms
smh
400
200
nS
Clock Synchronous Slave Mode
• During 32 kHz operation
(Condition: VDD=3.0V, VSS=0V, Ta=25°C, VIH1=0.8VDD, VIL1=0.2VDD, VOH=0.8VDD, VOL=0.2VDD
)
Characteristic
Transmitting data output delay time
Receiving data input set-up time
Receiving data input hold time
Symbol
Min.
Typ.
Max.
10
Unit
µS
µS
t
t
t
ssd
sss
ssh
10
5
µS
• During 1 MHz operation
(Condition: VDD=3.0V, VSS=0V, Ta=25°C, VIH1=0.8VDD, VIL1=0.2VDD, VOH=0.8VDD, VOL=0.2VDD
)
Characteristic
Transmitting data output delay time
Receiving data input set-up time
Receiving data input hold time
Symbol
Min.
Typ.
Max.
500
Unit
nS
nS
t
t
t
ssd
sss
ssh
400
200
nS
7
SEIKO [ SEIKO EPSON CORPORATION ]
