C509-L_97 Datasheet, PDF (145/290 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C509-L
6.3.4.6.1 Compare Function of Registers CC10 to CC17
The compare function of the registers CC10 to CC17 is equivalent to the compare function of the
CM1 to CM7 registers (when CM0-7 are controlled by the compare timer). The compare timer 1
configuration operates in compare mode 0. The description of the compare mode operation of the
CMx registers which is given in detail in section 6.3.4.4.1, is also valid for the compare mode
operation of the CC1x registers. Only the compare output port, the enable control, and the compare
timer flag are different.
Figure 6-34 below shows the CC1x registers when they are used for compare function.
Figure 6-34
Compare Function of a CC1x Register Assigned to the Compare Timer 1
The compare function of the compare time 1 configuration is selected by programming the direction
register of port 9 (DIR9) with the direction bit = 0. The direction register DIR9 is written to by a double
instruction sequence (first instruction sets PDIR in SFR IP1, second instruction writes to direction
register). The direction register has the same address as port 9.
Semiconductor Group
6-67
1997-10-01