DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 618

• 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
Rev. 4.00 Sep 27, 2006 page 572 of 1130
REJ09B0327-0400
Note: * To switch to reception after transmission, set KBE to 1 (KBBR receive enable) while KCLKI is low.
KCLK
(pin state)
KD
(pin state)
KCLK
(output)
KD
(output)
KCLK
(input)
KD
(input)
(KCLK = high, KD = high)
*
To receive operation or
Transmit end state
transmit operation
Read KBCRH
Read KBCRH
[1] [2] [3] [4] [5]
KCLKI = 0?
KCLK = 1?
KDI = 0?
1
I/O inhibit
Figure 17.5 Sample Transmit Processing Flowchart (cont)
Yes
Yes
Yes
Start bit
Start bit
No
No
No
[6]
1
Figure 17.6 Transmit Timing
0
0
[7]
[8]
2
Error handling
1
1
8
7
7
9
Parity bit Stop bit
Parity bit Stop bit
Keyboard side in data
Execute receive abort
transmission state.
processing.
10
2
Receive
completed
notification
[7]
11
[8]