PT7C4307 Datasheet, PDF (6/20 Pages) Pericom Semiconductor Corporation – Real-time Clock Module (I2C Bus)

Preliminary Data Sheet
PT7C4307
Real-time Clock Module (I²C Bus)
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Registers
Allocation of registers
Addr.
(hex)^*1
Function
00 Seconds (00-59)
Bit 7
/EOSC^*2
Bit 6
S40
Register definition
Bit 5
Bit 4
Bit 3
Bit 2
S20
S10
S8
S4
Bit 1
S2
Bit 0
S1
01 Minutes (00-59)
0
M40
M20
M10
M8
M4
M2
M1
02 Hours (00-23 / 01-12)
H20 or
0
12, /24
H10
H8
H4
H2
H1
P, /A
03 Days of the week (01-07)
0
0
0
0
0
W4
W2
W1
04 Dates (01-31)
0
0
D20
D10
D8
D4
D2
D1
05 Months (01-12)
0
0
0
MO10 MO8
MO4
MO2
MO1
06 Years (00-99)
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
07 Control^*3
OUT^*4
0
0
SQWE^*5
0
0
RS1^*6
RS0^*6
08~3F RAM^*7
-
-
-
-
-
-
-
-
Caution points:
*1. PT7C4307 uses 6 bits for address. That is if write data to 41H, the data will be written to 01H address register.
*2. Oscillator Enable bit. When this bit is set to 1, oscillator is stopped but time count chain is still active.
*3. Control register was used to select SQW/OUT pin output square wave with one of 4 kinds of frequency or DC level.
*4. Control SQW/OUT pin output DC level when square wave is disabled.
*5. Square wave outputs enable at SQW/OUT pin.
*6. Square wave output frequency select.
*7. PT7C4307 has 56×8 static RAM for customer use. It is volatile RAM.
*8. All bits marked with "0" are read-only bits. Their value when read is always "0". All bits marked with "-" are customer using
space.
PT0206(02/05)
6
Ver: 0