RTC-58321 Epson Company, RTC-58321 Datasheet - Page 4

• Manufacturer Part Number: RTC-58321
• Description: Real time clock module(4-bit I/O CONNECTION REAL TIME CLOCK MODULE)
• Manufacturer: Epson Company

4BIT REAL TIME CLOCK MODULE with I/O CONNECTIONS
RTC-58321/58323
n Overview
n Features
n Pin connections
The RTC-58321/58323 is a CMOS real time clock modules with perpetual calendar function developed for microcomputer applications.
It has a built-in 32.768 kHz quartz resonator, and provides clock and calendar registers for year, month, day, day-of-week, hours, minutes and
seconds, with 12-hour/24-hour selection, plus automatic leap-year correction with software selection for local calendars, and an additional
periodic reference signal output.
Being a CMOS device, it has a very low power consumption for battery back-up purposes.
l Adjustment-free built-in quartz resonator keeps component count low.
l Built-in clock and calendar registers for year, month, day, day-of-week, hours, minutes and seconds.
l 12-hour/24-hour selection.
l Automatic leap-year correction, with software selection for local calendars.
l Counter start, stop and reset functions.
l Periodic reference signal output selectable: 1024 Hz, or 1 second, 1 minute or 1 hour intervals.
l Data bus is 4-bit bidirectional, with memory-type reads and writes.
l CMOS device, for very low power consumption, and long battery back-up period.
l Compatible at pin and function levels with the MSM58321 RS.
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1 to 4. NC
10. D
11. D
5. CS
6. WRITE
7. READ
8. D
9. D
* Connect power supply positive side to pin 16.
1. CS
2. WRITE
3. READ
4. D
5. D
6. D
7. D
8. GND
NC: Pins are fixed low.
* Connect power supply positive side to pin 24.
0
1
2
3
0
1
2
3
2
2
14 to 16. V
18 to 24. V
13. CS
12. TEST
11. STOP
10 BUSY
9. ADDRESS WRITE
17. CS
16. TEST
15. STOP
14. BUSY
13. ADDRESS WRITE
12. GND
DD
DD
1
1
EPSON