BQ32000D集成电路（IC）的实时时钟规格书PDF中文资料

BQ32000D属于集成电路（IC）的实时时钟。由德州仪器制造生产的BQ32000D实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器，接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。

1 Features

1• 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

• Integrated Oscillator-Fail Detection

• 8-Pin SOIC Package

• –40°C to 85°C Ambient Operating Temperature

2 Applications

• General Consumer Electronics

3 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.