s-35399a02 Seiko Instruments Inc., s-35399a02 Datasheet - Page 15

• Manufacturer Part Number: s-35399a02
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.1.0
3. Status register 2
B0 : TEST
B1 : INT2AE, B2 : INT2ME, B3 : INT2FE
B4 : 32kE, B5 : INT1AE, B6 : INT1ME, B7 : INT1FE
Status register 2 is a 1-byte register that is used to display and set various modes. The bit configuration is shown below.
*1. Don’t care (Both of 0 and 1 are acceptable).
*1. Don’t care (Both of 0 and 1 are acceptable).
This is a test flag for SII. Be sure to set this flag to “0” in use. If this flag is set to “1”, be sure to initialize to set “0”.
These bits are used to select the output mode for the
alarm 2 interrupt, set alarm interrupt mode, then access the INT2 register and the alarm expansion register 2.
These bits are used to select the output mode for the
alarm 1 interrupt, set alarm interrupt mode, then access the INT1 register and the alarm expansion register 1.
INT2AE
_00
32kE
−
−
−
0
1
0
0
0
0
0
0
1
INT1FE
*1
*1
*1
R/W
B7
INT2ME
INT1AE
INT1ME
R/W
−
−
−
B6
0
0
1
1
0
0
0
1
1
*1
*1
*1
INT1AE
R/W
B5
INT1ME
Table 10 Output Modes for
Table 11 Output Modes for
INT2FE
−
0
0
1
1
0
1
*1
0
1
0
1
0
Figure 14 Status Register 2
Seiko Instruments Inc.
32kE
R/W
B4
INT1FE
No interrupt
Output of user-set frequency
Per-minute edge interrupt
Minute-periodical interrupt 1 (50% duty)
Alarm 2 interrupt
−
0
1
0
1
0
1
*1
INT2FE
INT
INT
R/W
B3
2
1
pin. Table 10 shows how to select the mode. To use an
pin. Table 11 shows how to select the mode. To use an
No interrupt
Output of user-set frequency
Per-minute edge interrupt
Minute-periodical interrupt 1 (50% duty)
Alarm 1 interrupt
Minute-periodical interrupt 2
32.768 kHz output
INT
INT
R/W:
INT2ME
2
1
R/W
B2
INT
Pin
Pin
Read/Write
2
INT
Pin Output Mode
2-WIRE REAL-TIME CLOCK
INT2AE
1
B1
R/W
Pin Output Mode
TEST
R/W
B0
S-35399A02
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