DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 582

• Manufacturer Part Number: DF2148ATE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148ATE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148ATE20; HD64F2148ATE20

Section 16 I
16.3.9
The logic levels at the SCL and SDA pins are routed through noise cancelers before being latched
internally. Figure 16.13 shows a block diagram of the noise canceler circuit.
The noise canceler consists of two cascaded latches and a match detector. The SCL (or SDA)
input signal is sampled on the system clock, but is not passed forward to the next circuit unless the
outputs of both latches agree. If they do not agree, the previous value is held.
16.3.10 Sample Flowcharts
Figures 16.14 to 16.17 show sample flowcharts for using the I
Rev. 4.00 Sep 27, 2006 page 536 of 1130
REJ09B0327-0400
SCL or
SDA input
signal
Sampling
clock
Noise Canceler
2
C Bus Interface [Option]
D
Sampling clock
System clock
period
Latch
Figure 16.13 Block Diagram of Noise Canceler
C
Q
D
Latch
C
Q
2
C bus interface in each mode.
detector
Match
Internal
SCL or
SDA
signal