RX-4801JE:UB Epson Toyocom Corporation, RX-4801JE:UB Datasheet - Page 9

• Manufacturer Part Number: RX-4801JE:UB
• Description: REAL TIME CLOCK MODULE
• Manufacturer: Epson Toyocom Corporation

Specifications of RX-4801JE:UB

• Memory Size: *
• Time Format: *
• Date Format: *
• Interface: *
• Voltage - Supply: *
• Operating Temperature: *
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5730413A

RX - 4801 SA / JE
8. Use Methods
8.1. Overview of Functions
1) Clock functions
2) Fixed-cycle interrupt generation function
3) Time update interrupt function
4) Alarm interrupt function
5) 32.768-kHz clock output
2099.
The fixed-cycle timer interrupt generation function generates an interrupt event periodically at any fixed cycle set
between 244.14 μs and 4095 minutes.
When an interrupt event is generated, the /INT pin goes to low level ("L") and "1" is set to the TF bit to report that an
event has occurred. (However, when a fixed-cycle timer interrupt event has been generated, low-level output from the
/INT pin occurs only when the value of the control register's TIE bit is "1". Up to 7.8 ms after the interrupt occurs, the
/INT status is automatically cleared (/INT status changes from low level to Hi-Z).
The time update interrupt function generates interrupt events at one-second or one-minute intervals, according to the
timing of the internal clock.
When an interrupt event occurs, the UF bit value becomes "1" and the /INT pin goes to low level to indicate that an
event has occurred. (However, when a fixed-cycle timer interrupt event has been generated, low-level output from the
/INT pin occurs only when the value of the control register's UIE bit is "1". This /INT status is automatically cleared
(/INT status changes from low level to Hi-Z) 7.8 ms (a fixed value) after the interrupt occurs.
The alarm interrupt generation function generates interrupt events for alarm settings such as date, day, hour, and
minute settings.
When an interrupt event occurs, the AF bit value is set to "1" and the /INT pin goes to low level to indicate that an event
has occurred.
The 32.768-kHz clock (with precision equal to that of the built-in crystal oscillator) can be output via the FOUT pin.
The FOUT pin is a CMOS output pin which can be set for clock output when the FOE pin is at high level and for
low-level output when the FOE pin is at high impedance.
This function is used to set and read out month, day, hour, date, minute, second, and year (last two digits) data.
Any (two-digit) year that is a multiple of 4 is treated as a leap year and calculated automatically as such until the year
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