參數(shù)資料
型號(hào)： S5N8947X
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： MCU for ADSL/Cable Modem
中文描述： 單片機(jī)為ADSL / Cable Modem的
文件頁數(shù)： 24/49頁
文件大?。?/td> 407K
代理商： S5N8947X
S5N8947 (ADSL/Cable Modem MCU)
ELECTRONICS
MagIC Team
Page : 24
SAMSUNG ELECTRONICS
6.3. I
2
C Bus Controller
The S5N8947’s Internal IC bus (I
2
C-bus) controller has the following important features :
l
It requires only two bus lines, a serial data line (SDA) and a serial clock line (SCL). When the I
2
C-bus
is free, both lines are High level.
l
Each device that is connected to the bus is software-addressable by a unique address. Slave
relationships on the bus are constant. The bus master can be either a master-transmitter or a master-
receiver. The I
2
C bus controller supports only single master mode.
l
It supports 8-bit, bi-directional, serial data transfers.
l
The number of ICs that you can connect to the same I
2
C-bus is limited only by the maximum bus
capacitance of 400 pF.
Following figure shows a block diagram of the S5N8947’s I
2
C-bus controller.
Data
Control
SCL
Control
Serial
Clock
Prescaler
Control status register (IICCON)
0
BUSY
COND1 COND0
ACK
LRB
IEN
Prescaler register (IICPS)
System clock (fMCLK)
16
SCL
SDA
BF
Shift buffer register (IICBUF)
Figure 6 I
2
C-Bus block diagram
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