PT7C4363_13 Datasheet, PDF (13/20 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4363
Real-time Clock Module (I²C Bus)
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4. Days of the week Counter
The day counter is a divide-by-7 counter that counts from 00 to 06 and up 06 before starting again from 00. Values that
correspond to the day of week are user defined but must be sequential (i.e., if 0 equals Sunday, then 1 equals Monday, and so on).
Illogical time and date entries result in undefined operation.
Addr.
Description
D7
D6
D5
(hex)
06 ^{Days of the week}



(default)
0
0
0
D4
D3
D2
D1
D0


W4
W2
W1
0
0
Undefined Undefined Undefined
5. Calendar Counter
The data format is BCD format.
 Day digits: Range from 1 to 31 (for January, March, May, July, August, October and December).
Range from 1 to 30 (for April, June, September and November).
Range from 1 to 29 (for February in leap years).
Range from 1 to 28 (for February in ordinary years).
Carried to month digits when cycled to 1.
 Month digits: Range from 1 to 12 and carried to year digits when cycled to 1.
 Year digits: Range from 00 to 99 and 00, 04, 08, … , 92 and 96 are counted as leap years.
Addr.
Description
D7
D6
D5
D4
D3
D2
D1
D0
(hex)
05
Dates
(default)


D20
D10
D8
D4
D2
D1
0
0
Undefined Undefined Undefined Undefined Undefined Undefined
07
Months
Century^*1

(default)
Undefined
0

M10
M8
M4
M2
M1
0
Undefined Undefined Undefined Undefined Undefined
08
Years
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
(default)
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
*1: The century bit is toggled when the years register overflows from 99 to 00.
6. Alarm Register
PT7C4363: Alarm Register
Addr. Description
D7
D6
09 ^{Alarm: Minutes}
(default)
Alarm: Hours
0A
(default)
AE^*1
M40
Undefined Undefined
AE^*2

Undefined
0
0B ^{Alarm: Dates}
(default)
AE^*3

Undefined
0
Alarm: Weekday
AE^*4

0C
(default)
Undefined
0
*1 Note: Minute alarm enable bit.
*2 Note: Hour alarm enable bit.
*3 Note: Date alarm enable bit.
*4 Note: Weekday alarm enable bit.
D5
M20
Undefined
H20
Undefined
D20
Undefined

0
D4
D3
D2
D1
D0
M10
M8
M4
M2
M1
Undefined Undefined Undefined Undefined Undefined
H10
H8
H4
H2
H1
Undefined Undefined Undefined Undefined Undefined
D10
D8
D4
D2
D1
Undefined Undefined Undefined Undefined Undefined


W4
W2
W1
0
0
Undefined Undefined Undefined
2013-06-0002
PT0207-6 06/18/13
13