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參數(shù)資料
| 型號(hào)： | M34519M8-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| 封裝： | 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件頁(yè)數(shù)： | 96/162頁(yè) |
| 文件大小： | 960K |
| 代理商： | M34519M8-XXXFP |
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4519 Group
Rev.3.01
2005.06.15
page 39 of 160
REJ03B0007-0301
(11) Timer input/output pin
(D6/CNTR0 pin, D7/CNTR1 pin)
CNTR0 pin is used to input the timer 1 count source and output the
timer 1 and timer 2 underflow signal divided by 2.
CNTR1 pin is used to input the timer 3 count source and output the
PWM signal generated by timer 4.
The D6/CNTR0 pin function can be selected by bit 0 of register W6.
The selection of D7/CNTR1 output signal can be controlled by bit 3
of register W4.
When the CNTR0 input is selected for timer 1 count source, timer
1 counts the rising or falling waveform of CNTR0 input. The count
edge is selected by the bit 2 of register W6.
When the CNTR1 input is selected for timer 3 count source, timer
3 counts the rising or falling waveform of CNTR1 input. The count
edge is selected by the bit 3 of register W6.
(12) PWM output function (D7/CNTR1, timer 3,
timer 4)
When bit 3 of register W4 is set to “1”, timer 4 reloads data from re-
load register R4L and R4H alternately each underflow.
Timer 4 generates the PWM signal (PWMOUT) of the “L” interval
set as reload register R4L, and the “H” interval set as reload regis-
ter R4H. The PWM signal (PWMOUT) is output from CNTR1 pin.
When bit 2 of register W4 is set to “1” at this time, the interval
(PWM signal “H” interval) set to reload register R4H for the counter
of timer 4 is extended for a half period of count source.
In this case, when a value set in reload register R4H is n, timer 4
divides the count source signal by n + 1.5 (n = 1 to 255).
When this function is used, set “1” or more to reload register R4H.
When bit 1 of register W6 is set to “1”, the PWM signal output to
CNTR1 pin is switched to valid/invalid each timer 3 underflow.
However, when timer 3 is stopped (bit 2 of register W3 is cleared to
“0”), this function is canceled.
Even when bit 1 of a register W4 is cleared to “0” in the “H” interval
of PWM signal, timer 4 does not stop until it next timer 4 underflow.
When clearing bit 1 of register W4 to “0” to stop timer 4 while the
PWM output function is used, avoid a timing when timer 4
underflows.
(9) Count start synchronization circuit (timer 1,
timer 3)
Timer 1 and timer 3 have the count start synchronous circuit which
synchronizes the input of INT0 pin and INT1 pin, and can start the
timer count operation.
Timer 1 count start synchronous circuit function is selected by set-
ting the bit 0 of register I1 to “1” and the control by INT0 pin input
can be performed.
Timer 3 count start synchronous circuit function is selected by set-
ting the bit 0 of register I2 to “1” and the control by INT1 pin input
can be performed.
When timer 1 or timer 3 count start synchronous circuit is used, the
count start synchronous circuit is set, the count source is input to
each timer by inputting valid waveform to INT0 pin or INT1 pin.
The valid waveform of INT0 pin or INT1 pin to set the count start
synchronous circuit is the same as the external interrupt activated
condition.
Once set, the count start synchronous circuit is cleared by clearing
the bit I10 or I20 to “0” or reset.
However, when the count auto-stop circuit is selected, the count
start synchronous circuit is cleared (auto-stop) at the timer 1 or
timer 3 underflow.
(10) Count auto-stop circuit (timer 1, timer 3)
Timer 1 has the count auto-stop circuit which is used to stop timer
1 automatically by the timer 1 underflow when the count start syn-
chronous circuit is used.
The count auto-stop cicuit is valid by setting the bit 3 of register W1
to “1”. It is cleared by the timer 1 underflow and the count source to
timer 1 is stopped.
This function is valid only when the timer 1 count start synchronous
circuit is selected.
Timer 3 has the count auto-stop circuit which is used to stop timer
3 automatically by the timer 3 underflow when the count start syn-
chronous circuit is used.
The count auto-stop cicuit is valid by setting the bit 3 of register W3
to “1”. It is cleared by the timer 3 underflow and the count source to
timer 3 is stopped.
This function is valid only when the timer 3 count start synchronous
circuit is selected.
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