參數(shù)資料
型號： M37542M4-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP32
封裝： 0.400 INCH, PLASTIC, SDIP-32
文件頁數(shù)： 60/68頁
文件大?。?/td> 1191K
代理商： M37542M4-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7542 Group
MITSUBISHI MICROCOMPUTERS
63
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
s Notes on Serial I/O1
Serial I/O interrupt
When setting the transmit enable bit to “1”, the serial I/O transmit
interrupt request bit is automatically set to “1”. When not requiring
the interrupt occurrence synchronized with the transmission en-
abled, take the following sequence.
Set the serial I/O transmit interrupt enable bit to “0” (disabled).
Set the transmit enable bit to “1”.
Set the serial I/O transmit interrupt request bit to “0” after 1 or
more instructions have been executed.
Set the serial I/O transmit interrupt enable bit to “1” (enabled).
I/O pin function when serial I/O1 is enabled.
The functions of P12 and P13 are switched with the setting values
of a serial I/O1 mode selection bit and a serial I/O1 synchronous
clock selection bit as follows.
(1) Serial I/O1 mode selection bit
→ “1” :
Clock synchronous type serial I/O is selected.
Setup of a serial I/O1 synchronous clock selection bit
“0” : P12 pin turns into an output pin of a synchronous clock.
“1” : P12 pin turns into an input pin of a synchronous clock.
Setup of a SRDY1 output enable bit (SRDY)
“0” : P13 pin can be used as a normal I/O pin.
“1” : P13 pin turns into a SRDY1 output pin.
(2) Serial I/O1 mode selection bit
→ “0” :
Clock asynchronous (UART) type serial I/O is selected.
Setup of a serial I/O1 synchronous clock selection bit
“0”: P12 pin can be used as a normal I/O pin.
“1”: P12 pin turns into an input pin of an external clock.
When clock asynchronous (UART) type serial I/O is selected, it is
P13 pin. It can be used as a normal I/O pin.
Bus collision detection
Bus collision detection can be used when SIO1 is operating at full-
duplex communication. When SIO1 is operating at half-duplex
communication, set bus collision detection interrupt to be dis-
abled.
s Notes on Serial I/O2
Serial I/O interrupt
When setting the transmit enable bit to “1”, the serial I/O transmit
interrupt request bit is automatically set to “1”. When not requiring
the interrupt occurrence synchronized with the transmission en-
abled, take the following sequence.
Set the serial I/O transmit interrupt enable bit to “0” (disabled).
Set the transmit enable bit to “1”.
Set the serial I/O transmit interrupt request bit to “0” after 1 or
more instructions have been executed.
Set the serial I/O transmit interrupt enable bit to “1” (enabled).
I/O pin function when serial I/O2 is enabled.
The functions of P06 and P07 are switched with the setting values
of a serial I/O2 mode selection bit and a serial I/O2 synchronous
clock selection bit as follows.
(1) Serial I/O2 mode selection bit
→ “1” :
Clock synchronous type serial I/O is selected.
Setup of a serial I/O2 synchronous clock selection bit
“0” : P06 pin turns into an output pin of a synchronous clock.
“1” : P06 pin turns into an input pin of a synchronous clock.
Setup of a SRDY2 output enable bit (SRDY)
“0” : P07 pin can be used as a normal I/O pin.
“1” : P07 pin turns into a SRDY2 output pin.
(2) Serial I/O2 mode selection bit
→ “0” :
Clock asynchronous (UART) type serial I/O is selected.
Setup of a serial I/O2 synchronous clock selection bit
“0”: P06 pin can be used as a normal I/O pin.
“1”: P06 pin turns into an input pin of an external clock.
When clock asynchronous (UART) type serial I/O is selected, it is
P07 pin. It can be used as a normal I/O pin.
s A-D Converter
The comparator uses internal capacitors whose charge will be lost
if the clock frequency is too low.
Make sure that f(XIN) is 500kHz or more during A-D conversion.
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