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參數(shù)資料
| 型號(hào)： | 933728070118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | REAL TIME CLOCK, PDSO16 |
| 封裝： | 7.50 MM, PLASTIC, MS-013, SOT-162-1, SO-16 |
| 文件頁數(shù)： | 26/28頁 |
| 文件大?。?/td> | 136K |
| 代理商： | 933728070118 |
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2003 Jan 27
7
Philips Semiconductors
Product specication
Clock/calendar with serial I/O
PCF8573
8
CHARACTERISTICS OF THE I2C-BUS
The I2C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line
(SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when
connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy.
8.1
Bit transfer
See Fig.4. One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the
HIGH period of the clock pulse as changes in the data line at this time will be interpreted as control signals.
8.2
Start and stop conditions
Refer to Fig.5. Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data
line, while the clock is HIGH is defined as the start condition (S). A LOW-to-HIGH transition of the data line while the
clock is HIGH is defined as the stop condition (P).
Fig.4 Bit transfer.
handbook, full pagewidth
MBC621
data line
stable;
data valid
change
of data
allowed
SDA
SCL
Fig.5 Definition of start and stop conditions.
handbook, full pagewidth
MBC622
SDA
SCL
P
STOP condition
SDA
SCL
S
START condition
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| 933728070112 | REAL TIME CLOCK, PDSO16 |
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| 056-000-22-59 | REELED LIGHTING SYSTEM YELLOW 25 MTRS |
| 056-000-22-60 | REELED LIGHTING SYSTEM GREEN 25 MTRS |
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