PT7C4302 PERICOM [Pericom Semiconductor Corporation], PT7C4302 Datasheet - Page 6

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

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2.
WP: Write Protect bit.
3.
Time digit display (in BCD code):
•
•
•
* Note: /EOSC bit must be written into 0 to start the time count.
PT0225(11/05)
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
Control and status register
Time Counter
WP
Description
Description
(default)
(default)
(default)
(default)
Seconds
Minutes
Control
Hours
Data
0
1
Undefined
/EOSC
12, /24
WP
Write operation is enabled.
Prevent a write operation to any other register.
D7
D7
0
1
0
0
*
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Undefined Undefined Undefined Undefined Undefined Undefined Undefined
M40
S40
D6
D6
0
0
0
0
H20 or P,/A
Undefined Undefined Undefined Undefined Undefined Undefined
M20
S20
D5
D5
0
0
Description
6
Real-time Clock Module (3-wire Interface)
M10
H10
S10
D4
D4
0
0
M8
D3
D3
H8
S8
0
0
Default
M4
D2
D2
H4
S4
0
0
M2
D1
D1
H2
S2
0
0
Data Sheet
PT7C4302
M1
D0
D0
H1
S1
Ver: 0
0
0