PT7C4302 PERICOM [Pericom Semiconductor Corporation], PT7C4302 Datasheet - Page 7

• Manufacturer Part Number: PT7C4302
• Description: Real-time Clock Module (3-wire Interface)
• Manufacturer: PERICOM [Pericom Semiconductor Corporation]

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a)
This bit is used to select between 12-hour clock operation and 24-hour clock operation.
Be sure to select between 12-hour and 24-hour clock operation before writing the time data.
4.
The day counter is a divide-by-7 counter that counts from 01 to 07 and up 07 before starting again from 01. Values that
correspond to the day of week are user defined but must be sequential (i.e., if 1 equals Sunday, then 2 equals Monday, and so on).
Illogical time and date entries result in undefined operation.
PT0225(11/05)
Addr.
(hex)
12, /24
05
0
1
12 / 24 bit
Days of the week Counter
Days of the week
Description
(default)
24-hour time display
12-hour time display
Description
D7
0
0
D6
24-hour clock
0
0
00
01
02
03
04
05
06
07
08
09
10
11
D5
0
0
12-hour clock
7
81 ( AM 01 )
82 ( AM 02 )
83 ( AM 03 )
84 ( AM 04 )
85 ( AM 05 )
86 ( AM 06 )
87 ( AM 07 )
88 ( AM 08 )
89 ( AM 09 )
90 ( AM 10 )
91 ( AM 11 )
92 ( AM 12)
Real-time Clock Module (3-wire Interface)
D4
0
0
Hours register
24-hour clock
D3
0
0
12
13
14
15
16
17
18
19
20
21
22
23
Undefined Undefined Undefined
W4
D2
12-hour clock
B2 ( PM 12 )
A1 ( PM 01 )
A2 ( PM 02 )
A3 ( PM 03 )
A4 ( PM 04 )
A5 ( PM 05 )
A6 ( PM 06 )
A7 ( PM 07 )
A8 ( PM 08 )
A9 ( PM 09 )
B0 ( PM 10 )
B1 ( PM 11 )
W2
D1
Data Sheet
PT7C4302
W1
D0
Ver: 0