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參數(shù)資料
| 型號： | 935192230015 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | REAL TIME CLOCK, UUC |
| 封裝： | DIE |
| 文件頁數(shù)： | 9/31頁 |
| 文件大小： | 213K |
| 代理商： | 935192230015 |
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1997 Mar 25
17
Philips Semiconductors
Product specication
Low power clock/calendar
PCF8593
9I2C-BUS PROTOCOL
9.1
Addressing
Before any data is transmitted on the I2C-bus, the device which should respond is addressed first. The addressing is
always carried out with the first byte transmitted after the start procedure.
The clock/calendar acts as a slave receiver or slave transmitter. Therefore the clock signal SCL is only an input signal,
but the data signal SDA is a bidirectional line. The clock/calendar slave address is shown in Fig.17.
9.2
Clock/calendar READ/WRITE cycles
The I2C-bus configuration for the different PCF8593 READ and WRITE cycles is shown in Figs 18, 19 and 20.
Fig.17 Slave address.
handbook, halfpage
MBD821
101
00
0
1
R/W
group 1
group 2
Fig.18 Master transmits to slave receiver (WRITE) mode.
handbook, full pagewidth
S
0A
SLAVE ADDRESS
WORD ADDRESS
A
DATA
P
acknowledgement
from slave
acknowledgement
from slave
acknowledgement
from slave
R/W
auto increment
memory word address
MBD822
n bytes
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