s-35190a Seiko Instruments Inc., s-35190a Datasheet - Page 25

• Manufacturer Part Number: s-35190a
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.2.4
5. Minute-periodical interrupt output 2
communication
The output of minute-periodical interrupt 2 is the function to output “L”, for 7.9 ms, from the INT pin, synchronizing with
the first minute-carry processing after selecting the output mode. However, in Read in the real-time data register, the
procedure delays at max. 0.5 sec thus output “L” from the INT pin also delays at max. 0.5 sec. In Write in the real-time
data register, some delay is made in the output period due to Write timing and the second-data during Write.
(a) During normal operation
(b) During Read in the real-time data register
(c) During Write in the real-time data register
Real-time data
_00
INT pin
write timing
Serial
INT pin
INT pin
read command
Real-time data
Minute-carry processing
7.9 ms
Minute-carry processing
Minute-carry processing
7.9 ms
7.9 ms
Figure 31 Timing of Minute-periodical Interrupt Output 2
Real-time
data reading
Second data of writing: "50" s
The output period is shorter.
45 s
60 s
55 s
carry processing)
Seiko Instruments Inc.
60 s
0.5 s Max.
(Normal minute-
Real-time data
read command
Minute-carry processing
Minute-carry processing
10 s
Real-time
data reading
Minute-carry processing
Second data of writing: "10" s
30 s
The output period is longer.
7.9 ms
7.9 ms
7.9 ms
60 s
60 s
3-WIRE REAL-TIME CLOCK
80 s
Minute-carry processing
50 s
Minute-carry processing
Minute-carry processing
7.9 ms
7.9 ms
S-35190A
7.9 ms
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