c8051t617 Silicon Laboratories, c8051t617 Datasheet - Page 25
c8051t617
Manufacturer Part Number
c8051t617
Description
Mixed Signal Byte-programmable Eprom Mcu
Manufacturer
Silicon Laboratories
Datasheet
1.C8051T617.pdf
(210 pages)
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1.5.
The C8051T61x Family includes an SMBus/I2C interface, a full-duplex UART with enhanced baud rate
configuration, and an Enhanced SPI interface. Each of the serial buses is fully implemented in hardware
and makes extensive use of the CIP-51's interrupts, thus requiring very little CPU intervention.
1.6.
An on-chip Programmable Counter/Timer Array (PCA) is included in addition to the four 16-bit general pur-
pose counter/timers. The PCA consists of a dedicated 16-bit counter/timer time base with five programma-
ble capture/compare modules. The PCA clock is derived from one of six sources: the system clock divided
by 12, the system clock divided by 4, Timer 0 overflows, an External Clock Input (ECI), the system clock, or
the external oscillator clock source divided by 8. The external clock source selection is useful for real-time
clock functionality, where the PCA is clocked by an external source while the internal oscillator drives the
system clock.
Each capture/compare module can be configured to operate in one of six modes: Edge-Triggered Capture,
Software Timer, High Speed Output, 8- or 16-bit Pulse Width Modulator, or Frequency Output. Additionally,
Capture/Compare Module 4 offers watchdog timer (WDT) capabilities. Following a system reset, Module 4
is configured and enabled in WDT mode. The PCA Capture/Compare Module I/O and External Clock Input
may be routed to Port I/O via the Digital Crossbar.
Serial Ports
Programmable Counter Array
Capture/Compare
Module 0
SYSCLK/12
Timer 0 Overflow
SYSCLK
External Clock/8
SYSCLK/4
ECI
Figure 1.7. PCA Block Diagram
Capture/Compare
Module 1
CLOCK
MUX
PCA
Crossbar
16-Bit Counter/Timer
Port I/O
Rev. 0.3
Capture/Compare
Module 2
C8051T610/1/2/3/4/5/6/7
Capture/Compare
Module 3
Capture/Compare
Module 4 / WDT
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