C8051F020DK Silicon Laboratories Inc, C8051F020DK Datasheet - Page 192
C8051F020DK
Manufacturer Part Number
C8051F020DK
Description
DEV KIT FOR F020/F021/F022/F023
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.C8051F020DK.pdf
(272 pages)
Specifications of C8051F020DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F02x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F020
Silicon Family Name
C8051F02x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051 F020/021/022/023
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1200
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F020DK
Manufacturer:
SiliconL
Quantity:
10
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C8051F020/1/2/3
18.4.2. Clock Rate Register
192
Bits7-0:
R/W
Bit7
SMB0CR.[7:0]: SMBus0 Clock Rate Preset
The SMB0CR Clock Rate register controls the frequency of the serial clock SCL in master mode. The
8-bit word stored in the SMB0CR Register preloads a dedicated 8-bit timer. The timer counts up, and
when it rolls over to 0x00, the SCL logic state toggles.
The SMB0CR setting should be bounded by the following equation , where SMB0CR is the unsigned
8-bit value in register SMB0CR, and SYSCLK is the system clock frequency in Hz:
The resulting SCL signal high and low times are given by the following equations:
Using the same value of SMB0CR from above, the Bus Free Timeout period is given in the following
equation:
R/W
Bit6
Figure 18.9. SMB0CR: SMBus0 Clock Rate Register
SMB0CR
T
R/W
Bit5
HIGH
T
T
BFT
LOW
258 SMB0CR
288
=
10
R/W
Bit4
256 SMB0CR
–
–
---------------------------------------------------- -
256 SMB0CR
0.85
–
Rev. 1.4
–
R/W
Bit3
SYSCLK
SYSCLK 1.125
SYSCLK
SYSCLK
R/W
Bit2
+
1
+
625ns
R/W
Bit1
R/W
Bit0
SFR Address:
00000000
Reset Value
0xCF
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