DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 540

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: 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): 4.5 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: HD64F2148BTE20; HD64F2148BTE20

Section 16 I
11. Note on IRIC flag clear when the wait function is used
Note: This restriction on usage can be canceled by setting the FNC1 and FNC0 bits to 1 in
Rev. 3.00 Mar 21, 2006 page 484 of 788
REJ09B0300-0300
If the rise time of SCL exceeds the stipulated value or a slave device in which a wait can be
inserted by driving the SCL pin low is used when the wait function is used in I
master mode, the IRIC flag should be cleared after determining that the SCL is low, as
described below.
If the IRIC flag is cleared to 0 when WAIT = 1 while the SCL is extending the high level time,
the SDA level may change before the SCL goes low, which may generate a start or stop
condition erroneously.
ICXR.
SDA
IRIC
SCL
2
C Bus Interface (IIC) (Optional)
Figure 16.34 IRIC Flag Clearing Timing When WAIT = 1
SCL = low detected
VIH
[1] SCL = low determination
Secures a high period
[2] IRIC clear
2
C bust interface