PT7C4363P Просмотр технического описания (PDF) - Pericom Semiconductor
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PT7C4363P Datasheet PDF : 22 Pages
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Data Sheet
PT7C4363
Real-time Clock Module (I2C Bus)
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Function Block
PT7C4363
X1
32.768
kHz
X2
CD
OSC
CG
Counter Chain
Control Register
INT
SQW
Timer / Alarm Interrupt Control
Square Wave Output Control
Comparator
Alarm Register
(Min, Hour, Day, Date)
Timer
Time Counter
(Sec,Min,Hour,Day,Date,Month,Year)
Address
Decoder
Address
Register
Shift Register
I /O
Interface
(I2C)
SCL
SDA
Note: PT7C4363 need to add a 10pF ~ 30pF capacitor between X1 and GND to get the accurate 32k frequency.
Recommended Layout for Crystal
32.768kHz
Crystal
PTP7CT473C074363
X1
X2
Local Ground plane
Layer 2
Guard Ring
(connect to gound)
Crystal Specifications
Parameter
Symbol
Min
Typ
Max
Nominal Frequency
fO
Series Resistance
ESR
32.768
40
Load Capacitance
CL
10
The crystal, traces and crystal input pins should be isolated from RF generating signals.
PT0207(07/05)
2
Unit
kHz
kΩ
pF
Ver: 0
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