Bq32000 Rtc Real-Time Clock (Optıonal) - VESTEL MB120 DS Service Manual

Features
Pinouts
16. BQ32000 RTC REAL-TİME CLOCK (OPTIONAL)
General Description
The bq32000 device is a compatible replacement for industry standard real-time clocks. The bq32000 features
an automatic backup supply with integrated trickle charger. The backup supply can be implemented using a
capacitor or non- rechargeable battery. The bq32000 has a programmable calibration adjustment from –63 ppm
to +126 ppm. The bq32000 registers include an OF(oscillator fail) flag indicating the status of the RTC
oscillator, as well as a STOP bit that allows the host processor to disable the oscillator. The time registers are
normally updated once per second, and all the registers are updated at the same time to prevent a timekeeping
glitch. The bq32000 includes automatic leap-year compensation.
Features
• Automatic Switchover to Backup Supply
• I2C Interface Supports Serial Clock up to 400 kHz
• Uses 32.768-kHz Crystal With –63-ppm to +126-ppm Adjustment
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