r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 458

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
Figure 20.15
20.3.3.1
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 high. A stop condition detect interrupt request is generated when the SDA2 pin changes state
from low to high while the SCL2 pin is high.
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.
Note that the setup times and hold times for start and stop condition detection may differ from the I
standard.
Figure 20.15 shows the Detection of Start and Stop Conditions.
5 cycles of f1 < Setup time
5 cycles of f1 < Hold time
Preliminary document
Specifications in this document are tentative and subject to change.
Detection of Start and Stop Conditions
Detection of Start and Stop Conditions
(Start condition)
(Stop condition)
SDA2
SDA2
SCL2
Setup time
Hold time
20. Serial Interface (UART2)
Page 427 of 725
2
C bus