PT7C4307WEX Pericom Semiconductor, PT7C4307WEX Datasheet - Page 5

• Manufacturer Part Number: PT7C4307WEX
• Description: IC REAL TIME CLK/CALENDAR 8-SOIC
• Manufacturer: Pericom Semiconductor
• Type: Clock/Calendarr

Specifications of PT7C4307WEX

• Memory Size: 56B
• Time Format: Binary
• Date Format: Binary
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 4.5 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: PT7C4307WEXTR

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Control and status register
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•
This bit, when set to a logic 1, will enable the oscillator output. The frequency of the square wave output depends upon the value
of the RS0 and RS1 bits. With the square wave output set to 1Hz, the clock registers update on the falling edge of the square wave.
•
These bits control the frequency of the square wave output when the square wave output has been enabled.
Time Counter
Time digit display (in BCD code):
•
•
•
* Note: /EOSC bit must be written into 0 to start the time count.
PT0206(08/09)
It controls the output level of the SQW/OUT pin when the square wave output is disabled.
Addr.
Addr.
(hex)
(hex)
07
00
01
02
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.
Read / Write
Read / Write
OUT
SQWE (Square Wave Enable)
RS (Rate Select)
RS1, RS0
OUT
Description
Description
(default)
(default)
(default)
(default)
Seconds
Minutes
Control
Hours
Data
Data
00
01
10
11
0
1
/EOSC
OUT
When SQWE = 0, SQW/OUT pin output low.
When SQWE = 0, SQW/OUT pin output high.
1
4.096k
8.192k
32.768k
D7
D7
0
0
0
0
0
0
*
SQW output freq. (Hz)
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
12, /24
M40
S40
D6
D6
0
0
H20 or P,/A
M20
S20
D5
D5
0
0
Description
Default
5
SQWE
M10
H10
S10
D4
D4
0
Real-time Clock Module (I
M8
D3
D3
H8
S8
0
0
Default
M4
D2
D2
H4
S4
0
0
RS1
M2
D1
D1
H2
S2
1
Data Sheet
PT7C4307
2
C Bus)
RS0
M1
D0
D0
H1
S1
Ver: 3
1