DF2268FA13V Renesas Electronics America, DF2268FA13V Datasheet - Page 479

• Manufacturer Part Number: DF2268FA13V
• Description: IC H8S/2268 MCU FLASH 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2268FA13V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 13MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: LCD, POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

14.4.9
The logic levels at the SCL and SDA pins are routed through noise cancellors before being latched
internally. Figure 14.20 shows a block diagram of the noise cancelled circuit.
The noise cancellor 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.
14.4.10 Initialization of Internal State
The IIC has a function for forcible initialization of its internal state if a deadlock occurs during
communication.
Initialization is executed by (1) setting bits CLR3 to CLR0 in the DDCSWR register or (2)
clearing the ICE bit. For details of settings for bits CLR3 to CLR0, see section 14.3.8, DDC
Switch Register (DDCSWR).
Scope of Initialization: The initialization executed by this function covers the following items:
• TDRE and RDRF internal flags
• Transmit/receive sequencer and internal operating clock counter
• Internal latches for retaining the output state of the SCL and SDA pins (wait, clock, data
output, etc.)
Noise Canceler
SCL or
SDA input
signal
Sampling
clock
Section 14 I
Figure 14.20 Block Diagram of Noise Cancellor
D
Sampling clock
System clock
period
Latch
C
2
C Bus Interface (IIC) (Supported as an Option by H8S/2264 Group)
Q
D
Latch
C
Q
Rev. 5.00 Sep. 01, 2009 Page 427 of 656
detector
Match
REJ09B0071-0500
Internal
SCL or
SDA
signal