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参数资料
| 型号： | 935262403118 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封装： | 3 MM, PLASTIC, TSSOP-8 |
| 文件页数： | 7/32页 |
| 文件大小： | 711K |
| 代理商： | 935262403118 |
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Philips Semiconductors
PCF8563
Real-time clock/calendar
Product specication
16 April 1999
15 of 30
9397 750 04855
Philips Electronics N.V. 1999. All rights reserved.
8.9.5
I2C-bus protocol
Addressing: Before any data is transmitted on the I2C-bus, the device which should
respond is addressed rst. The addressing is always carried out with the rst byte
transmitted after the start procedure.
The PCF8563 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 PCF8563 slave address is shown in Figure 10.
Clock/calendar read/write cycles: The I2C-bus conguration for the different
PCF8563 read and write cycles are shown in Figure 11, 12 and 13. The word
address is a four bit value that denes which register is to be accessed next. The
upper four bits of the word address are not used.
Fig 10. Slave address.
Fig 11. Master transmits to slave receiver (write mode).
handbook, halfpage
MRB016
1
0
1
0
A0 R/W
group 1
group 2
width
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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