C8051F020DK Silicon Laboratories Inc, C8051F020DK Datasheet - Page 240
![DEV KIT FOR F020/F021/F022/F023](/photos/9/23/92314/c8051f020dk_sml.jpg)
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
22.2. Timer 3
Timer 3 is a 16-bit timer formed by the two 8-bit SFRs, TMR3L (low byte) and TMR3H (high byte). Timer 3 may be
clocked by the external oscillator source (divided by eight) or the system clock (divided by either one or twelve as
specified by the Timer 3 Clock Select bit T3M in the Timer 3 Control Register TMR3CN). Timer 3 is always config-
ured as an auto-reload timer, with the reload value held in the TMR3RLL (low byte) and TMR3RLH (high byte) reg-
isters.
The Timer 3 external clock source feature offers a real-time clock (RTC) mode. When bit T3XCLK (TMR3CN.0) is
set to logic 1, Timer 3 is clocked by the external oscillator input (divided by 8) regardless of the system clock selec-
tion. This split clock domain allows Timer 3 to be clocked by a precision external source while the system clock is
derived from the high-speed internal oscillator. When T3XCLK is logic 0, the Timer 3 clock source is specified by bit
T3M (TMR3CN.1).
Timer 3 can also be used to start an ADC Data Conversion, for SMBus timing (see Section
AGEMENT BUS / I2C BUS
ter mode.
240
Oscillator Source
SYSCLK
External
8
12
T3M
0
1
(SMBUS0)” on page 183), or as a general-purpose timer. Timer 3 does not have a coun-
(from SMBus)
Figure 22.19. Timer 3 Block Diagram
SCL
T3XCLK
Crossbar
1
0
TOE
TR3
Rev. 1.4
Reload
TCLK
TMR3RLL TMR3RLH
TMR3L
TMR3H
“18. SYSTEM MAN-
T3XCLK
T3M
TF3
TR3
(to ADC)
Interrupt
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