C8051F330DK Silicon Laboratories Inc, C8051F330DK Datasheet - Page 189
![DEV KIT FOR C8051F330/F331](/photos/9/23/92306/c8051f330dk_sml.jpg)
C8051F330DK
Manufacturer Part Number
C8051F330DK
Description
DEV KIT FOR C8051F330/F331
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F330DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F33x
Interface Type
RS-232
Operating Supply Voltage
7 V to 15 V
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F330
Silicon Family Name
C8051F33x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051F330, C8051F331
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1264
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19. Programmable Counter Array
The Programmable Counter Array (PCA0) provides enhanced timer functionality while requiring less CPU
intervention than the standard 8051 counter/timers. The PCA consists of a dedicated 16-bit counter/timer
and three 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
Crossbar Decoder” on page 125
a programmable timebase that can select between six sources: 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 input pin. Each capture/compare module may be configured to operate
independently in one of six modes: Edge-Triggered Capture, Software Timer, High-Speed Output, Fre-
quency Output, 8-Bit PWM, or 16-Bit PWM (each mode is described in
Modules” on page 195
allowing the PCA to be clocked by a precision external oscillator while the internal oscillator drives the sys-
tem clock. The PCA is configured and controlled through the system controller's Special Function Regis-
ters. The PCA block diagram is shown in Figure 19.1
Important Note: The PCA Module 2 may be used as a watchdog timer (WDT), and is enabled in this mode
following a system reset. Access to certain PCA registers is restricted while WDT mode is enabled .
See
Section 19.3
for details.
). The external oscillator clock option is ideal for real-time clock (RTC) functionality,
Figure 19.1. PCA Block Diagram
Capture/Compare
for details on configuring the Crossbar). The counter/timer is driven by
Module 0
SYSCLK/12
Timer 0 Overflow
SYSCLK
External Clock/8
SYSCLK/4
ECI
Crossbar
Port I/O
Rev. 1.7
Capture/Compare
Module 1
CLOCK
MUX
PCA
C8051F330/1/2/3/4/5
16-Bit Counter/Timer
Capture/Compare
Module 2 / WDT
Section “19.2. Capture/Compare
Section “14.1. Priority
193
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