r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 515

• 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
Figure 23.15
23.5.1
Whether a start or a stop condition has been detected is determined.
A start condition detect interrupt request is generated when the SDA2 pin changes state from high to low while
the SCL2 pin is in the high state. A stop condition detect interrupt request is generated when the SDA2 pin
changes state from low to high while the SCL2 pin is in the high state.
Because the start and stop condition detect interrupts share an interrupt control register and vector, check the
BBS bit in the U2SMR register to determine which interrupt source is requesting the interrupt.
Figure 23.15 shows the Detection of Start and Stop Conditions.
Detection of Start and Stop Conditions
5 cycles of f1 < Setting up duration
5 cycles of f1 < Holding duration
Detection of Start and Stop Conditions
(Start condition)
(Stop condition)
SDA2
SDA2
SCL2
Setting up
duration
duration
Holding
23. Serial Interface (UART2)
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