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SM8578BV 数据表(PDF) 6 Page - Nippon Precision Circuits Inc

部件名 SM8578BV
功能描述  Real-time Clock IC
Download  13 Pages
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制造商  NPC [Nippon Precision Circuits Inc]
网页  http://www.npc.co.jp/en
标志 NPC - Nippon Precision Circuits Inc

SM8578BV 数据表(HTML) 6 Page - Nippon Precision Circuits Inc

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SM8578BV
NIPPON PRECISION CIRCUITS INC.—6
FUNCTIONAL DESCRIPTION
Register Table
Address
Function
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Read
Write
0
Second
FOS
40
20
10
8421
Yes
Yes
1
Minute
fr
40
20
10
8421
Yes
Excl. bit 7
2
Hour
fr
*
20
10
8421
Yes
Excl. bit 7
3
Day-of-week
fr
6543210
Yes
Excl. bit 7
4
Day
fr
*
20
10
8421
Yes
Excl. bit 7
5
Month
fr
*
*
10
8421
Yes
Excl. bit 7
6
Year
80
40
20
10
8421
Yes
Yes
7
Minute alarm
AE
40
20
10
8421
Yes
Yes
8
Hour alarm
AE
*
20
10
8421
Yes
Yes
9
Day-of-week alarm
AE
6543210
Yes
Yes
A
Day alarm
AE
*
20
10
8421
Yes
Yes
B
Frequency
FE
*
FD4
FD3
*
FD2
FD1
FD0
Yes
Yes
C
Fixed cycle
TE
*
TD1
TD0
****
Yes
Yes
D
Fixed-cycle counter
128
64
32
16
8421
Yes
Yes
E
Control 1
*
*
*
TI/TP
AF
TF
AIE
TIE
Yes
Yes*1
*1. The AF and TF bits have “0” only valid write data values.
Note 1. When power is applied, all register values are undefined, hence they must be initialized.
Note 2. When Register D is read, the previously preset data value written to the register is read.
F
Control 2
*
TEST
*
RESET
HOLD
*
*
*
Yes
Yes


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