C8051F560-TB Silicon Laboratories Inc, C8051F560-TB Datasheet - Page 228
![BOARD PROTOTYPE W/C8051F560](/photos/9/25/92557/c8051f560-tb_sml.jpg)
C8051F560-TB
Manufacturer Part Number
C8051F560-TB
Description
BOARD PROTOTYPE W/C8051F560
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.TOOLSTICK560DC.pdf
(302 pages)
Specifications of C8051F560-TB
Contents
Board
Processor To Be Evaluated
C8051F56x
Processor Series
C8051F56x
Interface Type
USB
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
1.8 V to 5.25 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F55x, C8051F56x, C8051F57x
For Use With
336-1691 - KIT DEVELOPMENT FOR C8051F560
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1694
- Current page: 228 of 302
- Download datasheet (3Mb)
C8051F55x/56x/57x
22.5.2. Read Sequence (Master)
During a read sequence, an SMBus master reads data from a slave device. The master in this transfer will
be a transmitter during the address byte, and a receiver during all data bytes. The SMBus interface gener-
ates the START condition and transmits the first byte containing the address of the target slave and the
data direction bit. In this case the data direction bit (R/W) will be logic 1 (READ). Serial data is then
received from the slave on SDA while the SMBus outputs the serial clock. The slave transmits one or more
bytes of serial data. An interrupt is generated after each received byte.
Software must write the ACK bit at that time to ACK or NACK the received byte. Writing a 1 to the ACK bit
generates an ACK; writing a 0 generates a NACK. Software should write a 0 to the ACK bit for the last data
transfer, to transmit a NACK. The interface exits Master Receiver Mode after the STO bit is set and a
STOP is generated. The interface will switch to Master Transmitter Mode if SMB0DAT is written while an
active Master Receiver. Figure 22.6 shows a typical master read sequence. Two received data bytes are
shown, though any number of bytes may be received. Notice that the ‘data byte transferred’ interrupts
occur before the ACK cycle in this mode.
228
S
Received by SMBus
Interface
Transmitted by
SMBus Interface
SLA
Figure 22.6. Typical Master Read Sequence
R
A
Data Byte
Interrupts
Rev. 1.1
A
S = START
P = STOP
A = ACK
N = NACK
R = READ
SLA = Slave Address
Data Byte
N
P
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