r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 518

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
23.5.7
If a start condition is detected while the STAC bit is set to 1 (UART2 initialization enabled), the serial interface
operates as described below.
• The transmit shift register is initialized, and the contents of the U2TB register are transferred to the transmit
• The receive shift register is initialized, and the serial interface starts receiving data when the next clock pulse
• The SWC bit is set to 1 (SCL wait output enabled). Consequently, the SCL2 pin is pulled low at the falling
Note that when UART2 transmission/reception is started using this function, the TI bit does not change state.
Select the external clock as the transfer clock to start UART2 transmission/reception with this setting.
shift register. In this way, the serial interface starts sending data when the next clock pulse is applied.
However, the UART2 output value does not change state and remains the same as when a start condition was
detected until the first bit of data is output in synchronization with the input clock.
is applied.
edge of the 9th clock pulse.
Initialization of Transmission/Reception
23. Serial Interface (UART2)
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