参数资料
型号: L64781
厂商: LSI CORP
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封装: PLASTIC, QFP-100
文件页数: 105/164页
文件大小: 2003K
代理商: L64781
Microprocessor Interface
3-5
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.
Step 12. The slave starts transmitting the data.
Step 13. The master generates an acknowledge during the ACK cycle.
Steps 12 and 13 are repeated as long as the master wants to read
consecutive addresses.
Step 14. When the last register is read, the master does not generate an
acknowledge during ACK cycle.
Step 15. The master terminates the cycle by issuing a stop condition.
Figure 3.5
Multiread from Slave without Repeat Start Condition
8-Bit Address
7-Bit Slave Address
First 8-Bit Data
ACKn
Slave
Master
ACKn
Stop
R/Wn
ACKn
Slave
ACKn
Slave
7-Bit Slave Address
R/Wn
SCL
SDA
Step 1 Step 2 Step 3 Step 4
Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12Step 13
Condition
Stop
Condition
Step 14
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2
Bit 1 Bit 0
Master
ACKn
Last 8-Bit Data
Step 15
Start
Condition
Start
Condition
l64781.book Page 5 Friday, January 19, 2001 1:28 PM
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