S-35199A01 Datasheet, PDF (38/54 Pages) Seiko Instruments Inc – 3-WIRE REAL-TIME CLOCK

3-WIRE REAL-TIME CLOCK
S-35199A01
Rev.1.0_00
(4) INT register 1 access and INT register 2 access
In Read/Write the INT register 1, data varies depending on the setting of the status register 2. Be sure to Read/Write
the INT register 1 after setting the status register 2. When setting the alarm by using the status register 2, these
registers work as 3-byte alarm time data registers, in other statuses, they work as 1-byte registers. When outputting
the user-set frequency, they are the data registers to set up the frequency.
Caution Users cannot use both functions of alarm 1 interrupt for INT pin and the output of user-set
frequency simultaneously.
Read/Write the INT register 2 after setting INT2AE in the status register 2. When INT2AE is in “1”, the INT register 2
works as for setting the 3-byte alarm time data. The INT register 2 does not have the function to output the user-set
frequency. Regarding details of each data, refer to “4. INT register 1 and INT register 2” in “„ Configuration of
Register”.
CS
1
8
16
24
32
SCK
*1
X 011010
SIO
R/W
B7
B0 B7
B0 B7
B0
Code +
command
During reading: Output mode switching
Day of week
data
Hour data
*1. 0 : INT register 1 selected
1 : INT register 2 selected
Minute data
During reading:
Input mode switching
Figure 44 INT Register 1 Access and INT Register 2 Access
CS
1
8
16
SCK
R/W
SIO
X 0110100
B7
B0
Code +
Command
During reading: Output mode switching
Frequency setting
data
During reading:
Input mode switching
Figure 45 INT Register 1 (Data Register for output frequency) Access
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Seiko Instruments Inc.