C8051T606DK Silicon Laboratories Inc, C8051T606DK Datasheet - Page 124
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
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C8051T600/1/2/3/4/5/6
The SMBCS1–0 bits select the SMBus clock source, which is used only when operating as a master or
when the Free Timeout detection is enabled. When operating as a master, overflows from the selected
source determine the absolute minimum SCL low and high times as defined in Equation 23.1. Note that the
selected clock source may be shared by other peripherals so long as the timer is left running at all times.
For example, Timer 1 overflows may generate the SMBus and UART baud rates simultaneously. Timer
configuration is covered in Section “25. Timers” on page 145.
The selected clock source should be configured to establish the minimum SCL High and Low times as per
Equation 23.1. When the interface is operating as a master (and SCL is not driven or extended by any
other devices on the bus), the typical SMBus bit rate is approximated by Equation 23.2.
Figure 23.4 shows the typical SCL generation described by Equation 23.2. Notice that T
twice as large as T
extended low by slower slave devices, or driven low by contending master devices). The bit rate when
operating as a master will never exceed the limits defined by Equation 23.1.
Setting the EXTHOLD bit extends the minimum setup and hold times for the SDA line. The minimum SDA
setup time defines the absolute minimum time that SDA is stable before SCL transitions from low-to-high.
The minimum SDA hold time defines the absolute minimum time that the current SDA value remains stable
124
Timer Source
Overflows
SCL
LOW
Equation 23.1. Minimum SCL High and Low Times
T
Low
. The actual SCL output may vary due to other devices on the bus (SCL may be
Figure 23.4. Typical SMBus SCL Generation
Table 23.1. SMBus Clock Source Selection
SMBCS1
T
Equation 23.2. Typical SMBus Bit Rate
HighMin
0
0
1
1
BitRate
T
SMBCS0
=
High
T
0
1
0
1
LowMin
=
f
--------------------------------------------- -
ClockSourceOverflow
Rev. 1.2
=
Timer 2 High Byte Overflow
Timer 2 Low Byte Overflow
SMBus Clock Source
--------------------------------------------- -
f
ClockSourceOverflow
Timer 0 Overflow
Timer 1 Overflow
3
1
SCL High Timeout
HIGH
is typically
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