C511_1 Datasheet, PDF (65/128 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Units
6.3.3.2 Using Timer 2 to Generate Baud Rates
Timer 2 is selected as the baud rate generator by setting TCLK and/or RCLK in T2CON. Note then
the baud rates for transmit and receive can be simultaneously different. Setting RCLK and/or TCLK
puts timer 2 into its baud rate generator mode, as shown in figure 6-6-26.
Figure 6-26
Timer 2 in Baud Rate Generator Mode
The baud rate generator mode is similar to the auto-reload mode, in that rollover in TH2 causes the
timer 2 registers to be reloaded with the 16-bit value in registers RC2H and RC2L, which are preset
by software.
Semiconductor Group
6-32