SN8P1700
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 116
Revision 1.93
TIMER COUNTER 0 (TC0)
OVERVIEW
The timer counter 0 (TC0) is used to generate an interrupt request when a specified time interval has elapsed. TC0
has a auto re-loadable counter that consists of two parts: an 8-bit reload register (TC0R) into which you write the
counter reference value, and an 8-bit counter register (TC0C) whose value is automatically incremented by counter
logic.
Figure 7-4. Timer Count TC0 Block Diagram
The main purposes of the TC0 timer counter is as following.
8-bit programmable timer:
Generates interrupts at specific time intervals based on the selected clock
frequency.
Arbitrary frequency output (Buzzer output):
Outputs selectable clock frequencies to the BZ0 pin (P5.4).
PWM function:
PWM output can be generated by the PWM1OUT bit and output to PWM0OUT pin (P5.4).
P5.4
TC0R reload
data buffer
TC0enb
TC0C
8-bit binary counter
TC0 Time out
load
Aload0
Auto. reload
÷
2
TC0out
Internal P5.4 I/O circuit
CPUM0
S
R
Compare
PWM0OUT
PWM
Buzzer
÷
2
(8-TC0Rate)
f
cpu
P5.4
TC0R reload
data buffer
TC0enb
TC0C
8-bit binary counter
TC0 Time out
load
Aload0
Auto. reload
÷
2
TC0out
Internal P5.4 I/O circuit
CPUM0
S
R
Compare
PWM0OUT
PWM
Buzzer
÷
2
(8-TC0Rate)
f
cpu