r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 593

• 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
26.7
Figure 26.20
The states of pins SCL and SDA are routed through the noise canceller before being latched internally.
Figure 26.20 shows a Noise Canceller Block Diagram.
The noise canceller consists of two cascaded latch and match detector circuits. When the SCL pin input signal (or
SDA pin input signal) is sampled on f1 and two latch outputs match, the level is passed forward to the next circuit.
When they do not match, the former value is retained.
f1 (sampling clock)
Noise Canceller
SCL or SDA
input signal
Noise Canceller Block Diagram
f1 (sampling clock)
f1 period
D
Latch
C
Q
D
Latch
C
Q
detection
Match
circuit
26. I
Internal SCL
or SDA signal
Page 561 of 740
2
C bus Interface