參數(shù)資料
型號: PCD3316T
廠商: NXP SEMICONDUCTORS
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Caller-ID on Call Waiting CIDCW receiver
中文描述: SPECIALTY TELECOM CIRCUIT, PDSO16
封裝: 7.50 MM, PLASTIC, SOT-162-1, SO-16
文件頁數(shù): 11/30頁
文件大?。?/td> 534K
代理商: PCD3316T
Philips Semiconductors
PCD3316
CIDCW receiver
Product specification
11 March 1999
11 of 30
9397 750 04824
Philips Electronics N.V. 1999. All rights reserved.
Unetited
7.12.2
START and STOP conditions
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 a
STOP condition (P); see
Figure 10
.
7.12.3
Bit transfer
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 a control signal; see
Figure 11
.
7.12.4
Acknowledge
The number of data bytes transferred between the START and the STOP conditions
from the transmitter to the receiver is unlimited. Each byte of eight bits is followed by
an acknowledge bit. The acknowledge bit is a HIGH level signal put on the bus by the
transmitter during which time the master generates an extra acknowledge-related
clock pulse.
A slave receiver which is addressed must generate an acknowledge after the
reception of each byte. Also a master receiver must generate an acknowledge after
the reception of each byte that has been clocked out of the slave transmitter.
Fig 9.
I
2
C-bus configuration.
MBA605
MASTER
TRANSMITTER /
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER /
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER /
RECEIVER
SDA
SCL
Fig 10. START and STOP conditions for the I
2
C-bus.
MBA608
SDA
SCL
P
STOP condition
SDA
SCL
S
START condition
Fig 11. I
2
C-bus bit transfer.
MBA607
data line
stable;
data valid
change
of data
allowed
SDA
SCL
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