M16C26 Datasheet, PDF (93/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Timer A
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change. _{M16C/26 Group}
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Condition : Reload register = 000316, when external trigger
(rising edge of TAiIN pin input signal) is selected
1 / fi X (2¹⁶ 1)
Count source
TAiIN pin
H
input signal
L
PWM pulse output ^H
from TAiOUT pin
L
Timer Ai interrupt 1
request bit
0
Trigger is not generated by this signal
1 / fi X n
fi : Frequency of count source
(f1, f2, f8, f32, fC32)
Cleared to 0 when interrupt request is accepted, or cleared by software
Note: n = 000016 to FFFE16.
Figure 1.12.14. Example of how a 16-bit pulse width modulator operates
Condition : Reload register high-order 8 bits = 0216
Reload register low-order 8 bits = 0216
External trigger (falling edge of TAiIN pin input signal) is selected
1 / fi X (m + 1) X (2⁸ 1)
Count source (Note1)
TAiIN pin input signal ^H
L
Underflow signal of ^H
8-bit prescaler (Note2) _L
PWM pulse output
H
from TAiOUT pin
L
Timer Ai interrupt
1
request bit
0
1 / fi X (m + 1)
1 / fi X (m + 1) X n
fi : Frequency of count source
(f1, f2, f8, f32, fC32)
Cleared to 0 when interrupt request is accepted, or cleaerd by software
Note 1: The 8-bit prescaler counts the count source.
Note 2: The 8-bit pulse width modulator counts the 8-bit prescaler's underflow signal.
Note 3: m = 0016 to FF16; n = 0016 to FE16.
Figure 1.12.15. Example of how an 8-bit pulse width modulator operates
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