Renesas M16C/62P Series Hardware Manual page 170

M16C/62P Group (M16C/62P, M16C/62PT)
Count source
Input signal to
TAiIN pin
PWM pulse output
from TAiOUT pin
IR bit in TAiIC
register
fj : Frequency of count source
(f1, f2, f8, f32, fC32)
i = 0 to 4
NOTES :
1. n = 0000h to FFFEh.
2. This timing diagram is for the case where the TAi register is "0003h", the TAiTGH and TAiTGL bits in the ONSF or TRGSR
register = 00b (TAiIN pin input), the MR1 bit of TAiMR register = 1 (rising edge), and the MR2 bit in the TAiMR register = 1
(trigger selected by TAiTGH and TAiTGL bits).
Figure 15.14 Example of 16-bit Pulse Width Modulator Operation
(1)
Count source
Input signal to
TAiIN pin
Underflow signal of
(2)
8-bit prescaler
PWM pulse output
from TAiOUT pin
IR bit in TAiIC
register
fj : Frequency of count source
(f1, f2, f8, f32, fC32)
i = 0 to 4
NOTES :
1. The 8-bit prescaler counts the count source.
2. The 8-bit pulse width modulator counts the output from the 8-bit prescaler underflow signal.
3. m = 00h to FFh; n = 00h to FEh.
4. This timing diagram is for the case where the TAi register is "0202h", the TAiTGH and TAiTGL bits in the ONSF or TRGSR
register = 00b (TAiIN pin input), the MR1 bit in the TAiMR register = 0 (falling edge), and the MR2 bit in the TAiMR register
= 1 (trigger selected by TAiTGH and TAiTGL bits).
Figure 15.15 Example of 8-bit Pulse Width Modulator Operation
Rev.2.41 Jan 10, 2006
REJ09B0185-0241
http://www.xinpian.net
"H"
"L"
"H"
"L"
"1"
"0"
"H"
"L"
"H"
"L"
"H"
"L"
"1"
"0"
Set to "0" upon accepting an interrupt request or by writing in program
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× (2 − 1)
16
1 / f
i
Trigger is not generated by this signal
× n
1 / f
j
Set to "0" upon accepting an interrupt request or by writing in program
× (m + 1) × (2
8
1 / f - 1)
j
× (m + 1)
1 / f
j
× (m + 1) × n
1 / f
j
15. Timers
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