C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 114

• Manufacturer Part Number: C509-L_97
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

On-Chip Peripheral Components
C509-L
6.3.1.2
Timer 2 Operating Modes
Figure 6-18 shows a functional block diagram of the timer 2 unit.
Figure 6-18
Block Diagram of Timer 2
In timer function, the count rate is derived from the oscillator frequency. A prescaler offers the
possibility of selecting a count rate of 1/6 to 1/384 of the oscillator frequency. Thus, the 16-bit timer
register (consisting of TH2 and TL2) is incremented at maximum in every machine cycle. The
prescaler is selected by the bits T2P1, T2P0, T2PS1, and T2PS (definition see previous page).
Semiconductor Group
6-36
1997-10-01