C8051F700-TB Silicon Laboratories Inc, C8051F700-TB Datasheet - Page 284
C8051F700-TB
Manufacturer Part Number
C8051F700-TB
Description
BOARD PROTOTYPE WITH C8051F700
Manufacturer
Silicon Laboratories Inc
Datasheets
1.C8051F700-TB.pdf
(1 pages)
2.C8051F700-TB.pdf
(306 pages)
3.C8051F700-TB.pdf
(18 pages)
Specifications of C8051F700-TB
Accessory Type
Target Board
Processor To Be Evaluated
C8051F700
Processor Series
C8051F7xx
Interface Type
USB
Operating Supply Voltage
7 V to 15 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F7xx
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1637
C8051F700
C8051F700
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C8051F70x/71x
34. 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. The counter/timer is driven by a
programmable timebase that can select between seven sources: system clock, system clock divided by
four, system clock divided by twelve, the external oscillator clock source divided by 8, Timer 0 overflows, 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 to 11-Bit PWM, or 16-Bit PWM (each mode is described in Section
“34.3. Capture/Compare Modules” on page 286). The external oscillator clock option is ideal for real-time
clock (RTC) functionality, allowing the PCA to be clocked by a precision external oscillator while the inter-
nal oscillator drives the system clock. The PCA is configured and controlled through the system controller's
Special Function Registers. The PCA block diagram is shown in Figure 34.1
284
Capture/Compare
Figure 34.1. PCA Block Diagram
Module 0
SYSCLK/12
SYSCLK/4
Timer 0 Overflow
SYSCLK
External Clock/8
ECI
Crossbar
Port I/O
Rev. 1.0
Capture/Compare
Module 1
CLOCK
MUX
PCA
16-Bit Counter/Timer
Capture/Compare
Module 2
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