Silicon Laboratories C8051F12 Series Manual page 290

C8051F120/1/2/3/4/5/6/7 C8051F130/1/2/3
The Timer 1 overflow rate is determined by the Timer 1 clock source (T1CLK) and reload value (TH1). The
frequency of T1CLK is selected as described in
Timer 1 overflow rate is calculated as shown in Equation 21.2.
When Timers 2, 3, or 4 are selected as a baud rate source, the baud rate is generated as shown in
Equation 21.3.
Equation 21.3. Mode 1 Baud Rate using Timer 2, 3, or 4
Mode1_BaudRate
The overflow rate for Timer 2, 3, or 4 is determined by the clock source for the timer (TnCLK) and the 16-
bit reload value stored in the RCAPn register (n = 2, 3, or 4), as shown in Equation 21.4.
Equation 21.4. Timer 2, 3, or 4 Overflow Rate
Timer234_OverflowRate
290
Section "23.1. Timer 0 and Timer 1" on page 309
Equation 21.2. Timer 1 Overflow Rate
Timer1_OverflowRate
⁄
= 1 16
=
Rev. 1.4
⁄ (
= T1CLK 256 TH1 –
⋅
Timer234_OverflowRate
⁄ (
TnCLK 65536 RCAPn –
. The
)
)