參數(shù)資料
型號(hào)： S-35399A03-J8T2G
元件分類(lèi)： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO8
封裝： LEAD FREE, SOP-8
文件頁(yè)數(shù)： 20/53頁(yè)
文件大小： 472K
代理商： S-35399A03-J8T2G
2-WIRE REAL-TIME CLOCK
Rev.2.0_00
S-35399A03
Seiko Instruments Inc.
27
6. Operation of power-on detection circuit (only in the
1
INT
pin output mode)
When power is applied to the S-35399A03, the power-on detection operates to set “1” in the POC flag (B0 in the status
register 1). A 1 Hz clock pulse is output from the
1
INT
pin.
OFF
INT1FE
32kE = 0, INT1AE = INT1ME = 0
Status register 2 setting
INT1 pin
0.5 s
Change by reset command
Figure 30 Output Timing of
1
INT
Pin during Operation of Power-on Detection Circuit
Function to Clock-Correction
The function to clock-correction is to correct advance/delay of the clock due to the deviation of oscillation frequency, in
order to make a high precise clock. For correction, the S-35399A03 adjusts the clock pulse by using a certain part of the
dividing circuit, not adjusting the frequency of the crystal oscillator. Correction is performed once every 20 seconds (or 60
seconds). The minimum resolution is approx. 3 ppm (or approx. 1 ppm) and the S-35399A03 corrects in the range of
195.3 to +192.2 ppm (or of 65.1 to +64.1 ppm). (Refer to Table 14.) Users can set up this function by using the
clock-correction register. Regarding how to calculate the setting data, refer to “1. How to calculate”. When not using this
function, be sure to set “00h”.
Table 14 Function to Clock-Correction
B0 = 0
B0 = 1
Adjustment
Every 20 seconds
Every 60 seconds
Minimum resolution
3.052 ppm
1.017 ppm
Correction range
195.3 to +192.2 ppm
65.1 to +64.1 ppm
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