PT7C4337 Datasheet, PDF (9/25 Pages) List of Unclassifed Manufacturers – Real-time Clock Module (I2C Bus)

Data Sheet
PT7C4337
Real-time Clock Module (I²C Bus)
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Time Counter
Time digit display (in BCD code):
• Second digits: Range from 00 to 59 and carried to minute digits when incremented from 59 to 00.
• Minute digits: Range from 00 to 59 and carried to hour digits when incremented from 59 to 00.
• Hour digits: See description on the /12, 24 bit. Carried to day and day-of-the-week digits when incremented from 11 p.m. to
12 a.m. or 23 to 00.
Addr.
Description
D7
D6
D5
D4
D3
D2
D1
D0
(hex)
00
Seconds
(default)
0
S40
S20
S10
S8
S4
S2
S1
0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
01
Minutes
(default)
0
M40
M20
M10
M8
M4
M2
M1
0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
02
Hours
(default)
0
12, /24 H20 or P,/A H10
H8
H4
H2
H1
0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Note: Any registered imaginary time should be replaced with correct time, otherwise it will cause the clock counter malfunction.
• 12, /24 bit
This bit is used to select between 12-hour clock system and 24-hour clock system.
12, /24
Data
Description
Read / Write
0
24-hour system
1
12-hour system
This bit is used to select between 12-hour clock operation and 24-hour clock operation.
12, /24
Description
Hours register
0 24-hour time display
1 12-hour time display
24-hour clock
00
01
02
03
04
05
06
07
08
09
10
11
12-hour clock
52 ( AM 12 )
41 ( AM 01 )
42 ( AM 02 )
43 ( AM 03 )
44 ( AM 04 )
45 ( AM 05 )
46 ( AM 06 )
47 ( AM 07 )
48 ( AM 08 )
49 ( AM 09 )
50 ( AM 10 )
51 ( AM 11 )
24-hour clock
12
13
14
15
16
17
18
19
20
21
22
23
* Be sure to select between 12-hour and 24-hour clock operation before writing the time data.
12-hour clock
72 ( PM 12)
61 ( PM 01 )
62 ( PM 02 )
63 ( PM 03 )
64 ( PM 04 )
65 ( PM 05 )
66 ( PM 06 )
67 ( PM 07 )
68 ( PM 08 )
69 ( PM 09 )
70 ( PM 10 )
71 ( PM 11 )
PT0205(02/07)
9
Ver: 1