PT7C4311WEX Pericom Semiconductor, PT7C4311WEX Datasheet - Page 7

• Manufacturer Part Number: PT7C4311WEX
• Description: IC REAL TIME CLK/CALENDAR 8-SOIC
• Manufacturer: Pericom Semiconductor
• Type: Clock/Calendarr

Specifications of PT7C4311WEX

• Memory Size: 56B
• Time Format: Binary
• Date Format: Binary
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PT7C4311WEXTR

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3.
Time digit display (in BCD code):
•
•
•
* Note 1: ST bit: Stop oscillation and time count chain.
* Note 2: Do not care.
* Note 3: Century Enable Bit and Century Bit.
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.
5.
The data format is BCD format.
•
•
•
PT0322(08/09)
Addr.
(hex)
Addr.
Addr.
(hex)
(hex)
03
00
01
02
04
05
06
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.
Day digits: Range from 1 to 31 (for January, March, May, July, August, October and December).
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.
Time Counter
Days of the week Counter
Calendar Counter
Days of the week
Description
Months (01-12)
Years (00-99)
Dates (01-31)
(default)
Description
Description
(default)
(default)
(default)
(default)
(default)
(default)
Seconds
Minutes
Hours
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.
Undefined
D7
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
×
CEB
Y80
D7
ST
×
D7
×
×
0
0
0
*2
*3
Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
D6
×
M40
CB
Y40
S40
D6
D6
×
×
0
*3
Undefined
Undefined Undefined Undefined Undefined Undefined Undefined
D5
×
M20
H20
D20
Y20
S20
D5
D5
×
7
Undefined
M10
M10
H10
D10
Y10
S10
D4
D4
D4
×
Real-time Clock Module (I
Undefined Undefined Undefined Undefined
M8
M8
D3
H8
D3
D8
Y8
S8
D3
×
M4
M4
D2
H4
D2
D4
Y4
S4
W4
D2
M2
M2
D1
H2
D1
D2
Y2
S2
W2
D1
Data Sheet
PT7C4311
2
C Bus)
M1
W1
M1
D0
H1
D0
D1
Y1
S1
D0
Ver: 2