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MB90335 Series
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Synchronous type
Either asynchronous method or (start-stop synchronization) clock synchronous method can be selected.
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Signal type
Data in NRZ (Non Return to Zero) format is only supported.
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Start of transmission/reception
When the bit indicating that sending operation is enabled (SCR0, SCR1: TXE) is set to "1", sending
operation starts.
Receiving operation starts when the reception enable bit of the serial control register (SCR0, SCR1:RXE) is
set to "1".
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Stop of transmission/reception
Transmission stops when the transmission enable bit (SCR0, SCR1:TXE) in the serial control register is set
to "0".
Reception stops when the reception enable bit (SCR0, SCR1:RXE) in the serial control register is set to
"0".
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Stop during transmission/reception
When receiving operation (SCR0, SCR1: RXE=0) is disabled in the middle of reception (while data is
being input to the receiving shift register), the receiving operation is halted after the frame that is being
received has completely received and the received data has been stored into the serial input data registers 0,
1 (SIDR0, SIDR1).
When sending operation (SCR0, SCR1: TXE=0) is disabled in the middle of transmission (while data is
being output from the sending shift register), the sending operation is halted after one frame has been
completely sent.
CM44-10137-6E
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 18 UART
18.7 Explanation of Operation of UART
415
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