DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 627

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• 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: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

17.3.9
When KBIOE is 0, the internal KCLK and internal KD settings are fixed at 1.
Therefore, if the KCLK pin is low when the KBIOE bit is set to 1, the edge detection circuit
operates and the KCLK falling edge is detected.
If the KBFSEL bit and KBE bit are both 0 at this time, the KBF bit is set. Figure 17.14 shows the
timing of KBIOE setting and KCLK falling edge detection.
KCLK (pin)
Internal KCLK
(KCLKI)
KBIOE
Falling edge
signal
KBFSEL
KBE
KBF
Usage Note
Figure 17.14 KBIOE Setting and KCLK Falling Edge Detection Timing
T1
T2
Rev. 4.00 Sep 27, 2006 page 581 of 1130
Section 17 Keyboard Buffer Controller
REJ09B0327-0400