s-35199a01 Seiko Instruments Inc., s-35199a01 Datasheet - Page 38

• Manufacturer Part Number: s-35199a01
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

38
3-WIRE REAL-TIME CLOCK
S-35199A01
(4) INT register 1 access and INT register 2 access
During reading: Output mode switching
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.
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 “
Register” .
Caution Users cannot use both functions of alarm 1 interrupt for INT pin and the output of user-set
During reading: Output mode switching
*1. 0 : INT register 1 selected
1 : INT register 2 selected
frequency simultaneously.
SCK
SIO
CS
Figure 45 INT Register 1 (Data Register for output frequency) Access
SCK
Figure 44 INT Register 1 Access and INT Register 2 Access
X
SIO
CS
0
1
1
command
1
Code +
0
*1
X
1
0
0
1
1
Command
1
Code +
Seiko Instruments Inc.
8
B7
0
Day of week
R / W
1
0
data
0
8
B7
B0
R / W
Frequency setting
data
16
B7
Hour data
16
B0
B0
24
B7
Minute data
During reading:
Input mode switching
32
B0
During reading:
Input mode switching
Configuration of
Rev.1.0
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