DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 612

• 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

Section 17 Keyboard Buffer Controller
Bit 6—Keyboard Clock Out (KCLKO): Controls KBC clock I/O pin output.
Bit 6
KCLKO
0
1
Bit 5—Keyboard Data Out (KDO): Controls KBC data I/O pin output.
Bit 5
KDO
0
1
Bit 4—Reserved: This bit cannot be modified and is always read as 1.
Bits 3 to 0—Receive Counter (RXCR3 to RXCR0): These bits indicate the received data bit.
Their value is incremented on the fall of KCLK. These bits cannot be modified.
The receive counter is initialized to 0000 by a reset and when 0 is written in KBE. Its value returns
to 0000 after a stop bit is received.
Bit 3
RXCR3
0
1
Rev. 4.00 Sep 27, 2006 page 566 of 1130
REJ09B0327-0400
Bit 2
RXCR2
0
1
0
1
Description
Keyboard buffer controller clock I/O pin is low
Keyboard buffer controller clock I/O pin is high
Description
Keyboard buffer controller data I/O pin is low
Keyboard buffer controller data I/O pin is high
Bit 1
RXCR1
0
1
0
1
0
1
—
Bit 0
RXCR0
0
1
0
1
0
1
0
1
0
1
0
1
—
Receive Data Contents
—
Start bit
KB0
KB1
KB2
KB3
KB4
KB5
KB6
KB7
Parity bit
—
—
(Initial value)
(Initial value)
(Initial value)