C8051F005-TB Silicon Laboratories Inc, C8051F005-TB Datasheet - Page 154
C8051F005-TB
Manufacturer Part Number
C8051F005-TB
Description
BOARD PROTOTYPING W/C8051F005
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F005-TB
Contents
Board
Data Bus Width
8 bit
Silicon Manufacturer
Silicon Laboratories
Core Architecture
8051
Silicon Family Name
C8051F00x
Kit Contents
Board
Features
JTAG Connector, Debug Adapter Interface, Analog I/O Configuration
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F005
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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20. PROGRAMMABLE COUNTER ARRAY
The Programmable Counter Array (PCA) 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 five
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 Section 15.1 for details on configuring the Crossbar).
The counter/timer is driven by a configurable timebase that can select between four inputs as its source: system
clock divided by twelve, system clock divided by four, Timer 0 overflow, or an external clock signal on the ECI
line. The PCA is configured and controlled through the system controller’s Special Function Registers. The basic
PCA block diagram is shown in Figure 20.1.
T0 Overflow
System
Clock
Capture/Compare
Module 0
/12
/4
CPS=11
10
Figure 20.1. PCA Block Diagram
01
Capture/Compare
00
Module 1
Crossbar
16-Bit Counter/Timer
Rev. 1.7
Port I/O
Capture/Compare
Module 2
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
Capture/Compare
Module 3
Capture/Compare
Module 4
154
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