HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 345

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Bus line
Stop condition issuing instruction
execution timing
Normal
operation
Erroneous
operation
Note on Issuance of Stop Condition
If the rise of SCL is weakened by external pull-up resistance R and bus load capacitance C in
master mode, or if SCL is pulled to the low level by a slave device, the timing at which SCL is
lowered by the internal bit synchronization circuit may be delayed by 1t SCL. If, in this case,
SCL is identified as being low at the bit synchronization circuit sampling timing, and a stop
condition issuing instruction is executed before the reference SCL clock next falls, as in figure
13.18, SDA will change from high to low to high while SCL remains high. As a result, a stop
condition will be issued before the end of the 9th clock.
Reference clock
SCL output
SDA output
SCL output
SDA output
SCL
SDA
IRIC
Figure 13.18 Stop Condition Erroneous Operation Timing
SCL identified as low
Bit synchronization circuit sampling timing
Erroneous
operation
9
9
V
IH
9th clock not ended
High interval secured
Normal operation
Stop condition
V
IH
Stop condition
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