PT7C4300 PERICOM [Pericom Semiconductor Corporation], PT7C4300 Datasheet - Page 5

• Manufacturer Part Number: PT7C4300
• Manufacturer: PERICOM [Pericom Semiconductor Corporation]

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Registers
1.
Addr.
(hex)
Caution points:
*1. PT7C4300 uses 3 bits for address. That is if write data to 08H, the data will be written to 00H address register.
*2. Stop bit. When this bit is set to 1, oscillator and time count chain are both stopped.
*3. CEB: Century Enable Bit. CB: Century Bit.
*4. Control FT/OUT pin output DC level when 512Hz square wave is disabled.
*5. Frequency Test. 512Hz square wave output is enabled at FT/OUT pin, which is using for frequency test.
*6. Sign Bit. “1” indicates positive calibration; “0”indicates negative calibration.
*7. Using for modifying count frequency. If 20ppm is wanted to slow down the count frequency, 10 (01010) should be loaded.
*8. Don’t care.
PT0222(02/06)
00
01
02
03
04
05
06
07
Allocation of registers
Calibration will not affect FT/OUT output frequency.
*1
Seconds (00-59)
Minutes (00-59)
Hours (00-23)
Days of the week (01-07)
Dates (01-31)
Months (01-12)
Years (00-99)
Control
*3
Function
OUT
CEB
Bit 7
ST
Y80
×
×
×
×
*2
*3
*4
Bit 6
CB
M40
FT
Y40
S40
×
×
×
*5
*3
5
Bit 5
M20
H20
D20
Y20
S20
×
S
×
*8
*6
Register definition
MO10
Bit 4
M10
H10
D10
Y10
S10
Real-time Clock Module (I
×
MO8
Bit 3
M8
H8
D8
Y8
S8
×
Calibration
MO4
Bit 2
M4
W4
H4
D4
Y4
S4
*7
MO2
Bit 1
Data Sheet
W2
M2
H2
D2
Y2
S2
PT7C4300
2
C Bus)
MO1
Bit 0
W1
M1
Ver: 0
H1
D1
Y1
S1