PT7C4300 PERICOM [Pericom Semiconductor Corporation], PT7C4300 Datasheet - Page 4

• Manufacturer Part Number: PT7C4300
• Manufacturer: PERICOM [Pericom Semiconductor Corporation]

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Function Description
Overview of Functions
1.
CPU can read or write data including the year (last two digits), month, date, day, hour, minute, and second. Any (two-digit) year
that is a multiple of 4 is treated as a leap year and calculated automatically as such until the year 2100.
2.
Data is read and written via the I
Since the output of the I/O pin SDA is open drain, a pull-up resistor should be used on the circuit board if the CPU output I/O is
also open drain.
The SCL's maximum clock frequency is 400 kHz, which supports the I
3.
Oscillator and time count chain can be enabled or disabled at the same time by ST bit.
4.
With the calibration bits properly set, accuracy PT7C4300 can be improved to better than ±2 ppm at 25°C.
PT0222(02/06)
Clock function
Interface with CPU
Oscillator enable/disable
Calibration function
2
C bus interface using two signal lines: SCL (clock) and SDA (data).
4
2
C bus's high-speed mode.
Real-time Clock Module (I
Data Sheet
PT7C4300
2
C Bus)
Ver: 0