參數(shù)資料
型號(hào)： M38C24M6-XXXHP
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP64
封裝： 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù)： 22/91頁(yè)
文件大?。?/td> 1867K
代理商： M38C24M6-XXXHP
28
38C2 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
(4) Set of Timer X Mode Register
Set the write control bit of the timer X mode register to “1” (write to
the latch only) when setting the IGBT output and PWM modes.
Output waveform simultaneously reflects the contents of both regis-
ters at the next underflow after writing to the timer X register (high-
order).
(5) Output Control Function of Timer X
When using the output control function (INT1 and INT2) in the IGBT
output mode, set the levels of INT1 and INT2 to “H” in the falling edge
active or to “L” in the rising edge active before switching to the IGBT
output mode.
(6) Note on Switch of CNTR0 Active Edge
When the CNTR0 active edge switch bits are set, at the same time,
the interrupt active edge is also affected.
When the pulse width is measured, set the bit 7 of the CNTR0 ac-
tive edge switch bits to “0”.
Timer Y
Timer Y is a 16-bit timer.
The timer Y count source can be selected by setting the timer Y mode
register. When f(XCIN) is selected as the count source, counting can
be performed regardless of XCIN oscillation. However, when XCIN is
stopped, the external pulse input from XCIN pin is counted.
Four operating modes can be selected for timer Y by the timer Y
mode register. Also, the real time port can be controlled.
(1) Timer Mode
The timer Y count source can be selected by setting the timer Y mode
register.
(2) Period Measurement Mode
The interrupt request is generated at rising/falling edge of CNTR1
pin input signal. Simultaneously, the value in timer Y latch is reloaded
in timer Y and timer Y continues counting. Except for that, this mode
operates just as in the timer mode.
The timer value just before the reloading at rising/falling of CNTR1
pin input is retained until the timer Y is read once after the reload.
The rising/falling timing of CNTR1 pin input is found by CNTR1 inter-
rupt. When using this mode, set the port sharing the CNTR1 pin to
input mode.
(3) Event Counter Mode
The timer counts signals input through the CNTR1 pin.
Except for that, this mode operates just as in the timer mode.
When using this mode, set the port sharing the CNTR1 pin to input
mode.
(4) Pulse Width HL Continuously Measurement
Mode
The interrupt request is generated at both rising and falling edges of
CNTR1 pin input signal. Except for that, this mode operates just as in
the period measurement mode. When using this mode, set the port
sharing the CNTR1 pin to input mode.
s Notes on Timer Y
q CNTR1 Interrupt Active Edge Selection
CNTR1 interrupt active edge depends on the CNTR1 active edge
switch bit. However, in pulse width HL continuously measurement
mode, CNTR1 interrupt request is generated at both rising and falling
edges of CNTR1 pin input signal regardless of the setting of CNTR1
active edge switch bit.
q Timer Y Read/Write Control
When reading from/writing to timer Y, read from/write to both the
high-order and low-order bytes of timer Y. When the value is read,
read the high-order bytes first and the low-order bytes next. When
the value is written, write the low-order bytes first and the high-
order bytes next.
If reading from the timer Y register during write operation or writing
to it during read operation is performed, normal operation will not
be performed.
When writing a value to the timer Y address to write to the latch
only, the value is set into the reload latch and the timer is updated
at the next underflow. Normally, when writing a value to the timer Y
address, the value is set into the timer and the timer latch at the
same time, because they are set to write at the same time.
When writing to the latch only, if the write timing to the high-order
reload latch and the underflow timing are almost the same, the value
is set into the timer and the timer latch at the same time. In this
time, counting is stopped during writing to the high-order reload
latch.
Do not switch the timer count source during timer count operation.
Stop the timer count before switching it.
q Real Time Port Control
When the real time port function is valid, data for the real time port is
output from ports P47 and P46 each time the timer Y underflows.
(However, if the real time port control bit is changed from “0” to “1”
after the data for real time port is set, data is output independent of
the timer Y operation.) When the data for the real time port is changed
while the real time port function is valid, the changed data is output at
the next underflow of timer Y. Before using this function, set the cor-
responding port direction registers to output mode.
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