DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 609

• 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: -

17.2
17.2.1
Note:
KBCRH is an 8-bit readable/writable register that indicates the operating status of the keyboard
buffer controller.
KBCRH is initialized to H'70 by a reset, and in standby mode, watch mode, subactive mode,
subsleep mode, and module stop mode. Bits 6, 5, and 2 to 0 are also initialized when KBIOE is
cleared to 0.
Bit 7—Keyboard In/Out Enable (KBIOE): Selects whether or not the keyboard buffer
controller is used. When KBIOE is set to 1, the keyboard buffer controller is enabled for
transmission and reception and the port pins function as KCLK and KD I/O pins. When KBIOE is
cleared to 0, the keyboard buffer controller stops functioning and the port pins go to the high-
impedance state.
Bit 7
KBIOE
0
1
Bit 6—Keyboard Clock In (KCLKI): Monitors the KCLK I/O pin. This bit cannot be modified.
Bit 6
KCLKI
0
1
Bit
Initial value
Read/Write
* Only 0 can be written, to clear the flags.
Register Descriptions
Keyboard Control Register H (KBCRH)
Description
The keyboard buffer controller is non-operational (KCLK and KD signal pins have
port functions)
The keyboard buffer controller is enabled for transmission and reception (KCLK and
KD signal pins are in the bus drive state)
Description
KCLK I/O pin is low
KCLK I/O pin is high
KBIOE
R/W
7
0
KCLKI
R
6
1
KDI
R
5
1
KBFSEL
R/W
4
1
Rev. 4.00 Sep 27, 2006 page 563 of 1130
KBIE
R/W
3
0
Section 17 Keyboard Buffer Controller
R/(W) *
KBF
2
0
R/(W) *
PER
1
0
REJ09B0327-0400
(Initial value)
(Initial value)
KBS
R
0
0