Siemens EF 88H Series Bedienungsanleitung Seite 96

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 137
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 95
Device Specification
Semiconductor Group 7-34
Compare/Capture Unit (CCU)
The compare/capture unit is a complex timer/register array for applications that require high
speed I/O pulse width modulation and more timer/counter capabilities.
The CCU contains
one 16-bit timer/counter (timer2) with 2-bit prescaler, reload capability and a max. clock
frequency of f
OSC/12
(1 MHz with a 12 MHz crystal).
one 16-bit timer (compare timer) with 8-bit prescaler, reload capability and a max. clock
frequency of f
OSC/2
(6 MHz with a 12 MHz crystal).
fifteen 16-bit compare registers.
five of which can be used as 16-bit capture registers.
up to 21 output lines controlled by the CCU.
nine interrupts which can be generated by CCU-events.
Figure 5 shows a block diagram of the CCU. Eight compare registers (CM0 to CM7) can
individually be assigned to either timer 2 or the compare timer. Diagrams of the two timers are
shown in figures 6 and 7. The four compare/capture registers, the compare/reload/capture
register and the comset/comclr register are always connected to timer 2. Depending on the
register type and the assigned timer three different compare modes can be selected.
Table 3 illustrates possible combinations and the corresponding output lines.
Seitenansicht 95
1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 136 137

Kommentare zu diesen Handbüchern

Keine Kommentare