MC68HC68T1 Description
Operating in a burst mode, successive Clock/RAM locations can be read or written using only a single starting address. An on chip oscillator allows acceptance of a selectable crystal frequency or the device can be programmed to accept a 50/60 Hz line input frequency. The LINE and system voltage (VSYS) pins give the MC68HC68T1 the capability for sensing power up/power down conditions, a capability useful for battery...
MC68HC68T1 Key Features
- Seconds, Minutes, Hours (AM/PM), Day-of-Week, Date, Month, Year (0
- 99), Auto Leap Year
- 32-Byte General Purpose RAM
- Direct Interface to Motorola SPI and National MICROWIRE Serial Data Ports
- Minimum Timekeeping Voltage: 2.2 V
- Burst Mode for Reading/Writing Successive Addresses in Clock/RAM
- Selectable Crystal or 50/60 Hz Line Input Frequency
- Clock Registers Utilize BCD Data
- Buffered Clock Output for Driving CPU Clock, Timer, Colon, or LCD Backplane
- Power-On Reset with First Time-Up Bit