R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 468

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 27
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 438 of 589
25.7
Figure 25.20
The states of pins SCL and SDA are routed through the noise canceller before being latched internally.
Figure 25.20 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
Internal SCL
or SDA signal
25. I
2
C bus Interface