C8051F800DK Silicon Laboratories Inc, C8051F800DK Datasheet - Page 209
![KIT DEV C8051F800](/photos/28/94/289400/mcudevkit_sml.jpg)
C8051F800DK
Manufacturer Part Number
C8051F800DK
Description
KIT DEV C8051F800
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F800DK
Contents
Board, Cables, CD, Debugger, Power Supply
Processor To Be Evaluated
C8051F800
Data Bus Width
16 bit
Interface Type
USB
Operating Supply Voltage
7 V to 15 V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F8xx
Lead Free Status / Rohs Status
Supplier Unconfirmed
Other names
336-1797
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28. Timers
Each MCU includes three counter/timers: two are 16-bit counter/timers compatible with those found in the
standard 8051, and one is a 16-bit auto-reload timer for use with the ADC, SMBus, or for general purpose
use. These timers can be used to measure time intervals, count external events and generate periodic
interrupt requests. Timer 0 and Timer 1 are nearly identical and have four primary modes of operation.
Timer 2 offers 16-bit and split 8-bit timer functionality with auto-reload. Additionally, Timer 2 offers the abil-
ity to be clocked from the external oscillator while the device is in Suspend mode, and can be used as a
wake-up source. This allows for implementation of a very low-power system, including RTC capability.
Timers 0 and 1 may be clocked by one of five sources, determined by the Timer Mode Select bits (T1M–
T0M) and the Clock Scale bits (SCA1–SCA0). The Clock Scale bits define a pre-scaled clock from which
Timer 0 and/or Timer 1 may be clocked (See SFR Definition 28.1 for pre-scaled clock selection).
Timer 0/1 may then be configured to use this pre-scaled clock signal or the system clock. Timer 2 may be
clocked by the system clock, the system clock divided by 12, or the external oscillator clock source divided
by 8.
Timer 0 and Timer 1 may also be operated as counters. When functioning as a counter, a counter/timer
register is incremented on each high-to-low transition at the selected input pin (T0 or T1). Events with a fre-
quency of up to one-fourth the system clock frequency can be counted. The input signal need not be peri-
odic, but it should be held at a given level for at least two full system clock cycles to ensure the level is
properly sampled.
Timer 0 and Timer 1 Modes
Two 8-bit counter/timers
8-bit counter/timer with
13-bit counter/timer
16-bit counter/timer
(Timer 0 only)
auto-reload
Rev. 1.0
Two 8-bit timers with auto-reload
16-bit timer with auto-reload
Timer 2 Modes
C8051F80x-83x
209
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