C8051F040DK Silicon Laboratories Inc, C8051F040DK Datasheet - Page 305
C8051F040DK
Manufacturer Part Number
C8051F040DK
Description
DEV KIT FOR F040/F041/F042/F043
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F040DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F04x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F040
Silicon Family Name
C8051F04x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051 F040, 041, 042, 043 MCUs
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1205
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Manufacturer:
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24. Programmable Counter Array
The Programmable Counter Array (PCA0) provides enhanced timer functionality while requiring less CPU
intervention than the standard 8051 counter/timers. PCA0 consists of a dedicated 16-bit counter/timer and
six 16-bit capture/compare modules. Each capture/compare module has its own associated I/O line
(CEXn) which is routed through the Crossbar to Port I/O when enabled (See
through 3 and the Priority Crossbar Decoder” on page
mable timebase that can select between six inputs as its source: system clock, system clock divided by
four, system clock divided by twelve, the external oscillator clock source divided by 8, Timer 0 overflow, or
an external clock signal on the ECI line. Each capture/compare module may be configured to operate inde-
pendently in one of six modes: Edge-Triggered Capture, Software Timer, High-Speed Output, Frequency
Output, 8-Bit PWM, or 16-Bit PWM (each is described in
trolled through the system controller's Special Function Registers. The basic PCA block diagram is shown
in Figure 24.1.
Capture/Compare
Module 0
SYSCLK/12
Timer 0 Overflow
SYSCLK
External Clock/8
SYSCLK/4
ECI
Capture/Compare
Module 1
CLOCK
MUX
PCA
Figure 24.1. PCA Block Diagram
16-Bit Counter/Timer
Capture/Compare
Module 2
Crossbar
Port I/O
Rev. 1.5
C8051F040/1/2/3/4/5/6/7
Section
Capture/Compare
204). The counter/timer is driven by a program-
Module 3
24.2). The PCA is configured and con-
Capture/Compare
Module 4
Section “17.1. Ports 0
Capture/Compare
Module 5
303
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