DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 621

• 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

KCLK
(pin state)
KD
(pin state)
KCLK
(input)
KCLK
(output)
KD
(input)
KD
(output)
Figure 17.8 Receive Abort and Transmit Start (Transmission/Reception Switchover)
Receive data processing
Receive operation ends
Transmit enabled state.
If there is transmit data,
the data is transmitted.
Reception in progress
Clear KBF flag
Processing 1
(KCLK = H)
normally
Figure 17.7 Sample Receive Abort Processing Flowchart (cont)
Keyboard side monitors clock during
receive operation (transmit operation
as seen from keyboard), and aborts
receive operation during this period.
[1]
Receive abort request
Timing
[1] On the system side, drive the KCLK pin low,
setting the I/O inhibit state.
Rev. 4.00 Sep 27, 2006 page 575 of 1130
Section 17 Keyboard Buffer Controller
Transmit operation
Start bit
REJ09B0327-0400