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参数资料
| 型号： | M38039G4H-XXXKP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64 |
| 文件页数： | 43/105页 |
| 文件大小： | 1416K |
| 代理商： | M38039G4H-XXXKP |
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REJ03B0166-0113 Rev.1.13
Aug 21, 2009
Page 40 of 100
3803 Group (Spec.H QzROM version)
(6) Programmable waveform generating mode
Mode selection
This mode can be selected by setting “100” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(XIN); or f(XCIN) can be
selected as the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512 or 1/1024 of f(XCIN); or f(XCIN) can be selected as the
count source.
Interrupt
The interrupt at an underflow is the same as the timer mode’s.
Explanation of operation
The operation is the same as the timer mode’s. Moreover the
timer outputs the data set in the output level latch (bit 4) of the
timer Z mode register (address 002A16) from the CNTR2 pin
each time the timer underflows.
Changing the value of the output level latch and the timer latch
after an underflow makes it possible to output an optional
waveform from the CNTR2 pin.
Precautions
The double-function port of CNTR2 pin and port P47 is
automatically set to the programmable waveform generating port
in this mode.
Figure 34 shows the timing chart of the programmable waveform
generating mode.
(7) Programmable one-shot generating mode
Mode selection
This mode can be selected by setting “101” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(XIN); or f(XCIN) can be
selected as the count source.
Interrupt
The interrupt at an underflow is the same as the timer mode’s.
The trigger to generate one-shot pulse can be selected by the INT1
active edge selection bit (bit 1) of the interrupt edge selection
register (address 003A16). When it is “0”, the falling edge active is
selected; when it is “1”, the rising edge active is selected.
When the valid edge of the INT1 pin is detected, the INT1
interrupt request bit (bit 1) of the interrupt request register 1
(address 003C16) is set to “1”.
Explanation of operation
1. “H” one-shot pulse; Bit 5 of timer Z mode register = “0”
The output level of the CNTR2 pin is initialized to “L” at
mode selection. When trigger generation (input signal to
INT1 pin) is detected, “H” is output from the CNTR2 pin.
When an underflow occurs, “L” is output. The “H” one-shot
pulse width is set by the setting value to the timer Z register
low-order and high-order. When trigger generating is
detected during timer count stop, although “H” is output
from the CNTR2 pin, “H” output state continues because an
underflow does not occur.
2. “L” one-shot pulse; Bit 5 of timer Z mode register = “1”
The output level of the CNTR2 pin is initialized to “H” at
mode selection. When trigger generation (input signal to
INT1 pin) is detected, “L” is output from the CNTR2 pin.
When an underflow occurs, “H” is output. The “L” one-shot
pulse width is set by the setting value to the timer Z low-
order and high-order. When trigger generating is detected
during timer count stop, although “L” is output from the
CNTR2 pin, “L” output state continues because an under-
flow does not occur.
Precautions
Set the double-function port of INT1 pin and port P42 to input in
this mode.
The double-function port of CNTR2 pin and port P47 is
automatically set to the programmable one-shot generating port
in this mode.
This mode cannot be used in low-speed mode.
If the value of the CNTR2 active edge switch bit is changed
during one-shot generating enabled or generating one-shot pulse,
then the output level from CNTR2 pin changes.
Figure 35 shows the timing chart of the programmable one-shot
generating mode.
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