DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 607

• 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: -

17.1.2
Figure 17.2 shows a block diagram of the keyboard buffer controller.
KD
(PS2AD,
PS2BD,
PS2CD)
KCLK
(PS2AC,
PS2BC,
PS2CC)
Legend:
KD:
KCLK:
KBBR:
KBCRH: Keyboard control register H
KBCRL: Keyboard control register L
Block Diagram
KBC data I/O pin
KBC clock I/O pin
Keyboard data buffer register
Control
Figure 17.2 Block Diagram of Keyboard Buffer Controller
logic
KDI
KCLKI
Parity
KDO
KCLKO
Register counter value
KB interrupt
KBCRH
KBCRL
KBBR
Rev. 4.00 Sep 27, 2006 page 561 of 1130
Section 17 Keyboard Buffer Controller
REJ09B0327-0400
Internal
data bus