M30622M4 MITSUBISHI [Mitsubishi Electric Semiconductor], M30622M4 Datasheet - Page 147

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M30622M4

Manufacturer Part Number
M30622M4
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
MITSUBISHI [Mitsubishi Electric Semiconductor]
Datasheet

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UART2 Special Mode Register 2
(1) The transmission shift register is initialized, and the content of the transmission register is transferred
(2) The reception shift register is initialized, and the microcomputer starts reception by dealing with the
(3) The SCL wait output bit turns to "1". This turns the SCL pin to "L" at the falling edge of the ninth bit of
Bit 4 of the UART2 special mode register 2 (address 0376
Setting this bit to "1", and when the start condition is detected, the microcomputer operates as follows.
Starting to transmit/receive signals to/from UART2 using this function doesn’t change the value of the
transmission buffer empty flag. To use this function, choose the external clock for the transfer clock.
Bit 5 of the UART2 special mode register 2 (0376
bit to "1" with the serial I/O specified allows the user to forcibly output an "L" from the SCL pin even if
UART2 is in operation. Setting this bit to "0" frees the "L" output from the SCL pin, and the UART2 clock
is input/output.
Bit 6 of the UART2 special mode register 2 (0376
to "1" forces the SDA pin to turn to the high-impedance state. Refrain from changing the value of this bit
at the rising edge of the UART2 transfer clock. There can be instances in which arbitration lost detection
flag is turned on.
to the transmission shift register. This starts transmission by dealing with the clock entered next as the
first bit. The UART2 output value, however, doesn’t change until the first bit data is output after the
entrance of the clock, and remains unchanged from the value at the moment when the microcomputer
detected the start condition.
clock entered next as the first bit.
the clock.
16
16
) is used as the SDA output disable bit. Setting this bit
) is used as the SCL pin wait output bit 2. Setting this
16
) is used as the UART2 initialization bit.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Mitsubishi microcomputers
M16C / 62 Group
147

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