Renesas Electronics ICM7170
The ICM7170 real time clock is a microprocessor bus compatible peripheral, fabricated using Intersil’s silicon gate CMOS LSl process. The clock is set or read by accessing the 8 internal separately addressable and programmable counters from 1/100 seconds to years. The counters are controlled by a pulse train divided down from a crystal oscillator circuit, and the frequency of the crystal is selectable with the on-chip command register.FEATURES
● 8-Bit, P Bus Compatible - Multiplexed or Direct Addressing● Regulated Oscillator Supply Ensures Frequency Stability and Low Power
● Time From 1/100 Seconds to 99 Years
● Software Selectable 12/24 Hour Format
● Latched Time Data Ensures No Roll Over During Read
● Full Calendar with Automatic Leap Year Correction
● On-Chip Battery Backup Switchover Circuit
● Access Time Less than 300ns
● 4 Programmable Crystal Oscillator Frequencies Over Industrial Temperature Range
● 3 Programmable Crystal Oscillator Frequencies Over Military Temperature Range
● On-Chip Alarm Comparator and RAM
● Interrupts from Alarm and 6 Selectable Periodic Intervals
● Standby Micro-Power Operation: 1.2A Typical at 3.0V and 32kHz Crystal
APPLICATIONS
● Portable and Personal Computers● Data Logging
● Industrial Control Systems
● Point Of Sale Related Literature
● Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)” Part Number Information TEMP. R...