C8051F020DK Silicon Laboratories Inc, C8051F020DK Datasheet - Page 244
![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
22.3.1. Mode 0: 16-bit Counter/Timer with Capture
In this mode, Timer 4 operates as a 16-bit counter/timer with capture facility. A high-to-low transition on the T4EX
input pin causes the following to occur:
Timer 4 can use either SYSCLK, SYSCLK divided by 12, or high-to-low transitions on the T4 input pin as its clock
source when operating in Capture mode. Clearing the C/T4 bit (T4CON.1) selects the system clock as the input for
the timer (divided by one or twelve as specified by the Timer Clock Select bit T4M in CKCON). When C/T4 is set to
logic 1, a high-to-low transition at the T4 input pin increments the counter/timer register. As the 16-bit counter/timer
register increments and overflows from 0xFFFF to 0x0000, the TF4 timer overflow flag (T4CON.7) is set and an
interrupt will occur if the interrupt is enabled.
Counter/Timer with Capture mode is selected by setting the Capture/Reload Select bit CP/RL4 (T4CON.0) and the
Timer 4 Run Control bit TR4 (T4CON.2) to logic 1. The Timer 4 External Enable EXEN4 (T4CON.3) must also be
set to logic 1 to enable a capture. If EXEN4 is cleared, transitions on T4EX will be ignored.
244
SYSCLK
1.
2.
3.
The 16-bit value in Timer 4 (TH4, TL4) is loaded into the capture registers (RCAP4H, RCAP4L).
The Timer 4 External Flag (EXF2) is set to ‘1’.
A Timer 4 interrupt is generated if enabled.
T4EX
T4
12
Crossbar
EXEN4
M
T
4
CKCON
M
0
1
T
2
M
T
1
M
T
0
Figure 22.25. T4 Mode 0 Block Diagram
0
1
TR4
Rev. 1.4
Capture
TCLK
RCAP4L
TL4
RCAP4H
TH4
CP/RL4
EXEN4
TCLK0
RCLK0
EXF4
C/T4
TR4
TF4
Interrupt
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