Renesas M16C/6NK Informacje Techniczne Strona 153

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Rev.2.10 Apr 14, 2006 page 129 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 13. Timers
Figure 13.13 Example of 16-bit Pulse Width Modulator Operation
1 / fi (2
1)
16
Count source
Input signal to
TAiIN pin
PWM pulse output
from TAiOUT pin
Trigger is not generated by this signal
"H"
"H"
"L"
"L"
IR bit in TAiIC
register
i = 0 to 4
fj: Frequency of count source (f1, f2, f8, f32, fC32)
1
0
NOTES:
1. n = 0000h to FFFEh.
2. This timing diagram is the following case.
TAi register = 0003h
Bits TAiTGH and TAiTGL in the ONSF or TRGSR register = 00b (TAiIN pin input)
The MR1 bit in the TAiMR register = 1 (rising edge)
The MR2 bit in the TAiMR register = 1 (trigger selected by bits TAiTGH and TAiTGL)
1 / fj
n
Set to 0 upon accepting an interrupt request or by writing in program
Count source
(1)
Input signal to
TAiIN pin
Underflow signal of
8-bit prescaler
(2)
PWM pulse output
from TAiOUT pin
"H"
"H"
"H"
"L"
"L"
"L"
1
0
Set to 0 upon accepting an interrupt request or by writing in program
1 / fj (m
+ 1) (2
1)
8
1 / fj (m + 1) n
1 / fj (m + 1)
IR bit in TAiIC
register
i = 0 to 4
fj: Frequency of count source (f1, f2, f8, f32, fC32)
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 the following case.
TAi register = 0202h
Bits TAiTGH and TAiTGL in the ONSF or TRGSR register = 00b (TAiIN pin input)
The MR1 bit in the TAiMR register = 0 (falling edge)
The MR2 bit in the TAiMR register = 1 (trigger selected by bits TAiTGH and TAiTGL)
Figure 13.14 Example of 8-bit Pulse Width Modulator Operation
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