C8051T606DK Silicon Laboratories Inc, C8051T606DK Datasheet - Page 127
C8051T606DK
Manufacturer Part Number
C8051T606DK
Description
KIT DEVELOPMENT FOR C8051T606
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheets
1.C8051T600EDB.pdf
(188 pages)
2.C8051T606TDB.pdf
(1 pages)
3.C8051T606DK.pdf
(16 pages)
4.C8051T606TDB.pdf
(14 pages)
Specifications of C8051T606DK
Contents
Board, Adapter, Cable, CD, Power Supply
Processor To Be Evaluated
C8051T606x
Interface Type
RS-232, USB
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051T606
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1666
- C8051T600EDB PDF datasheet
- C8051T606TDB PDF datasheet #2
- C8051T606DK PDF datasheet #3
- C8051T606TDB PDF datasheet #4
- Current page: 127 of 188
- Download datasheet (898Kb)
C8051T600/1/2/3/4/5/6
23.4.2. SMB0CN Control Register
SMB0CN is used to control the interface and to provide status information (see SFR Definition 23.2). The
higher four bits of SMB0CN (MASTER, TXMODE, STA, and STO) form a status vector that can be used to
jump to service routines. MASTER indicates whether a device is the master or slave during the current
transfer. TXMODE indicates whether the device is transmitting or receiving data for the current byte.
STA and STO indicate that a START and/or STOP has been detected or generated since the last SMBus
interrupt. STA and STO are also used to generate START and STOP conditions when operating as a mas-
ter. Writing a 1 to STA will cause the SMBus interface to enter Master Mode and generate a START when
the bus becomes free (STA is not cleared by hardware after the START is generated). Writing a 1 to STO
while in Master Mode will cause the interface to generate a STOP and end the current transfer after the
next ACK cycle. If STO and STA are both set (while in Master Mode), a STOP followed by a START will be
generated.
As a receiver, writing the ACK bit defines the outgoing ACK value; as a transmitter, reading the ACK bit
indicates the value received on the last ACK cycle. ACKRQ is set each time a byte is received, indicating
that an outgoing ACK value is needed. When ACKRQ is set, software should write the desired outgoing
value to the ACK bit before clearing SI. A NACK will be generated if software does not write the ACK bit
before clearing SI. SDA will reflect the defined ACK value immediately following a write to the ACK bit;
however SCL will remain low until SI is cleared. If a received slave address is not acknowledged, further
slave events will be ignored until the next START is detected.
The ARBLOST bit indicates that the interface has lost an arbitration. This may occur anytime the interface
is transmitting (master or slave). A lost arbitration while operating as a slave indicates a bus error condi-
tion. ARBLOST is cleared by hardware each time SI is cleared.
The SI bit (SMBus Interrupt Flag) is set at the beginning and end of each transfer, after each byte frame, or
when an arbitration is lost; see Table 23.3 for more details.
Important Note About the SI Bit: The SMBus interface is stalled while SI is set; thus SCL is held low, and
the bus is stalled until software clears SI.
Table 23.3 lists all sources for hardware changes to the SMB0CN bits. Refer to Table 23.4 for SMBus sta-
tus decoding using the SMB0CN register.
Rev. 1.2
127
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