RTC-7301DG:BS ROHS Epson Toyocom Corporation, RTC-7301DG:BS ROHS Datasheet - Page 18

• Manufacturer Part Number: RTC-7301DG:BS ROHS
• Description: IC REAL TIME CLOCK 18-DIP
• Manufacturer: Epson Toyocom Corporation
• Series: -r
• Type: Clock/Calendarr

Specifications of RTC-7301DG:BS ROHS

• Features: Alarm, Leap Year
• Memory Size: -
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 2.4 V ~ 5.5 V
• Voltage - Supply, Battery: 1.6 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 18-DIP (0.300", 7.62mm)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NB10-023097; SER3756

6-2-8-1. How to use the alarm
6-2-8-2. Example of use
RTC 7301 SF
6-2-8. Alarm interrupt
1 ) Issuing an alarm at 6:00 PM the next day:
2 ) Issuing an alarm at 6:00 AM every Sunday morning:
The /IRQ pin becomes “L” output when AIE = 1 when the alarm is matched, and it becomes high impedance when AIE
= 0.
An alarm interrupt is output when a carry occurs in the seconds digit.
/ IRQ Output
AF Bit
AIE Bit
Alarms can be set for dates, days, hours, minutes and seconds. It is not possible to set a multiple of days at one
time.
In order to avoid careless hardware interrupts while setting the alarms, we recommend setting both the AF and AIE
bits to “0” first. Then, set the alarm data and clear the AF flag to zero once to ensure its initialization. When
finished, set the AIE bit to “1”. If you do not wish to use the hardware interrupt, set the AIE bit to “0” and monitor
the AF bit with the software as is necessary.
Write “0” to the AIE bit, and “0” to the AF bit.
Write “1” to the AE bit of the date alarm.
Acquire the current date in the Bank 0 register 6 to the day alarm register and write the next day’s data in the day
Write “18h” to the hour alarm register.
Write “00h” to the minute alarm register.
Write “00h” to the second alarm register.
Clear the AF bit to zero.
Write “1” to the AIE bit.
Write “0” to the AIE bit, and “0” to the AF bit.
Write “1” to the AE bit of the date alarm.
Write “0h” to the day alarm register.
Write “06h” to the hour alarm register.
Write “00h” to the minute alarm register.
Write “00h” to the second alarm register.
Clear the AF bit to zero.
Write “1” to the AIE bit.
setting table. (If the acquired data is 6/H (Saturday), write 0/H (Sunday).)
/
DG
"1"
"0"
"1"
Writes to the AF bit
"0"
Page
* Does not output this area when AIE bit is "0."
15
"1"
Alarm Interrupt Timing
Hi-Z
”L” Level
”1”
”0”
ETM15E-02