0: T4 stops counting.
1: T4 start counting.
T4_C/T: T4 mode select bit.
0: T4 is used as a timer (input pulse is from internal system clock);
1: T4 is used as a counter (input pulse is from external T4/P0.6 pin).
T4x12: T4 speed control bit.
0: The clock source of T4 is SYSclk/12.
1: The clock source of T4 is SYSclk/1.
T4CLKO: T4 clock out control bit.
0: Turn off the clock output.
1: P0.7 is configured for T4 clock output pin. When T4 overflows, P0.7 will flip automatically.
TR3: T3 run control bit.
0: T3 stops counting.
1: T3 start counting.
T3_C/T: T3 mode select bit.
0: T3 is used as a timer (input pulse is from internal system clock);
1: T3 is used as a counter (input pulse is from external T3/P0.4 pin).
T3x12: T3 speed control bit.
0: The clock source of T3 is SYSclk/12.
1: The clock source of T3 is SYSclk/1.
T3CLKO: T3 clock out control bit.
0: Turn off the clock output.
1: P0.5 is configured for T3 clock output pin. When T3 overflows, P0.5 will flip automatically.
13.4.2 Timer 3 Counting Registers
T3 operates in 16-bit auto-reload mode. T3L and T3H combine into a 16-bit register with T3L as the low byte and
T3H as the high byte. When the 16-bit counter [T3H, T3L] overflows, the system loads the reload value in the
internal 16-bit reload register into [T3H, T3L] automatically.
13.4.3 Timer 4 Counting Registers
T4 operates in 16-bit auto-reload mode. T4L and T4H combine into a 16-bit register with T4L as the low byte and
T4H as the high byte. When the 16-bit counter [T4H, T4L] overflows, the system loads the reload value in the
internal 16-bit reload register into [T4H, T4L] automatically.
13.4.4 Timer 3 8-bit Prescaler Register (TM3PS)
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