C8051F010-TB Silicon Laboratories Inc, C8051F010-TB Datasheet - Page 154

• Manufacturer Part Number: C8051F010-TB
• Description: BOARD PROTOTYPING W/C8051F010
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F010-TB

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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
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