S-35390A-I8T1G Seiko Instruments, S-35390A-I8T1G Datasheet - Page 21

• Manufacturer Part Number: S-35390A-I8T1G
• Description: IC REAL TIME CLOCK 2WIRE SNT-8A
• Manufacturer: Seiko Instruments
• Type: Clock/Calendarr

Specifications of S-35390A-I8T1G

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SNT-8A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 728-1059-2; S-35390A-I8T1G

Rev.3.0
*1. If users clear INT1AE/INT2AE once; “L” is not output from the
These are selectable for the output mode for
Alarm interrupt, the output of user-set frequency, per-minute edge interrupt output, minute-periodical interrupt output 1. In
the
are also selectable.
To switch the output mode, use the status register 2. Refer to “3. Status register 2” in “ Configuration of Register”.
When switching the output mode, be careful of the output status of the pin. Especially, when using alarm interrupt/output
of frequency, switch the output mode after setting “00h” in the INT1/INT2 register. In 32.768 kHz output/per-minute edge
interrupt output/minute-periodical interrupt output, it is unnecessary to set data in the INT1/INT2 register for users.
Refer to the followings regarding each operation of output modes.
1. Alarm interrupt output
INT
Alarm interrupt output is the function to output “L” from the
come. If setting the pin output to “H”, turn off the alarm function by setting “0” in INT1AE/INT2AE in the status register 2.
To set the alarm time, set the data of day of the week, hour and minute in the INT1/INT2 register. Refer to “4. INT1
register and INT2 register” in “ Configuration of Register”.
Alarm setting of W (day of the week), H (hour), m (minute)”
again, within a period when the alarm time matches real-time data.
INT
1
INT1AE/INT2AE
INT1 pin/INT2 pin
_00
1
Pin and
Real-time data
pin output mode, in addition to the above modes, minute-periodical interrupt output 2 and 32.768 kHz output
Status register 2 setting
• INT1 pin output mode
• INT2 pin output mode
INT
32kE = 0, INT1ME = INT1FE = 0
INT2ME = INT2FE = 0
Change by program
2
W (day of the week)
H h (m − 1) m 59 s
Pin Output Mode
Alarm time matches
Figure 24 Alarm Interrupt Output Timing (1/2)
Second Minute
Real-time data
mx
INT1 register
INT2 register
INT
Seiko Instruments Inc.
1
Hour
Hx
H h 00 m 00 s
and
Change by program
the week
Day of
Period when alarm time matches
Comparator
INT
Wx
OFF
2
INT /
pins;
INTx register alarm enable flag
• AxHE = AxmE = AxWE = "1"
Day
1
01 s
INT
INT /
Month
2
1
pin, at the alarm time which is set by user has
INT
Change by program
Year
2
*1
2-WIRE REAL-TIME CLOCK
pin by setting INT1AE/INT2AE enable
59 s
Alarm interrupt
H h (m + 1) m 00 s
S-35390A
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