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參數資料
型號: L64781
廠商: LSI CORP
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: PLASTIC, QFP-100
文件頁數: 102/164頁
文件大小: 2003K
代理商: L64781
3-2
Interfaces
3.1.1 Serial Bus Read and Write Cycles
A general-call address is one in which the master does a start condition
followed by eight zeroes, Figure 3.2. This type of address addresses
every device on the serial bus. Any device that requires information
supplied through this general-call structure acknowledges the cycle. The
second byte, when set to 0b00000110 (0x06), indicates a reset and a
hardware write of the programmable part of the slave address.
Figure 3.2
General-Call Address
3.1.1.1 Single-Read Cycle
The single-read cycle has two variations: without, and with, repeat-start
condition.
Single-Read Cycle without Repeat Start Condition – The steps in a
single-read cycle with no repeat-start condition, Figure 3.3, are:
Step 1.
The master starts the cycle by issuing a start condition.
Step 2.
The master transmits the 7-bit slave address.
Step 3.
The master sets the R/W bit to 0, to indicate a write cycle.
Step 4.
The addressed slave acknowledges the reception of the slave
address by driving SDA LOW in the ACK cycle.
Step 5.
The master sends the 8-bit address.
Step 6.
The addressed slave acknowledges the reception of the
address by driving SDA LOW in the ACK cycle.
Step 7.
The master issues a stop condition.
Step 8.
The master issues a start condition.
Step 9.
The master transmits the 7-bit slave address.
Step 10. The master sets the R/W bit to 1, to indicate a read cycle.
Step 11. The addressed slave acknowledges the reception of the slave
address by driving SDA LOW in the ACK cycle.
S
General Call Address
S: Start Condition
A: Acknowledge Cycle
0 0 0 0 0 0 0 0 A X X X X X
0
X
A
l64781.book Page 2 Friday, January 19, 2001 1:28 PM
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相關代理商/技術參數
參數描述
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