PT7C4372A Datasheet, PDF (9/30 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4372A/4372C
Real-time Clock Module (I²C Bus)
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 CT2, CT1, CT0
Periodic interrupt output select bits.
CT2 CT1
CT0
Wave Form Mode
0
0
0
-
0
0
1
-
0
1
0
Pulse
0
1
1
Pulse
1
0
0
Level
1
0
1
Level
1
1
0
Level
1
1
1
Level
See section 6.5 for more detail.
Description
Cycle / Falling Timing
Off (“H”)
Fixed at “L”
2Hz (duty 50%)
1Hz (duty 50%)
Every second (synchronized with second count up)
Every minute (Occurs when seconds reach ":00")
Every hour (Occurs when minutes and seconds reach "00:00")
Every month (Occurs at 00:00:00 on first day of month)
Default
Control Register 2
PT7C4372A
Addr. Description
D7
D6
D5
D4
F
Control 2
-
(default)
0
-
/12, 24 ADJ or XSTP
0
Undefined
1
D4 when read is used as ADJ, when write is used as XSTP.
D3
/CLEN
0
D2
CTFG
0
D1
AAFG
0
D0
BAFG
0
PT7C4372C
Addr. Description
D7
D6
D5
F
Control 2
-
(default)
0
-
/12, 24
0
1
D4 when read is used as ADJ, when write is used as XSTP.
D4
ADJ or XSTP
1
D3
/CLEN
1
D2
CTFG
0
D1
AAFG
0
D0
BAFG
0
 /12, 24
/12, 24 time display selection bit.
/12, 24 Data
Read/
Write
0 12-hour time display
1 24-hour time display
See section “Alarm Function” for more detail.
PT7C4372C
/12, 24 time display selection bit.
/12, 24 Data
Read/
Write
0 12-hour time display
1 24-hour time display
See section “Alarm Function” for more detail.
Description
Description
* Default
* Default
12-07-0001
PT0150-8 07/04/12
9