DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 557

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: 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): 4.5 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: HD64F2148BTE20; HD64F2148BTE20

Disable receive abort
RXCR3 to RXCR0
Receive state
Read KBCRH
Read KBCRL
KBF = 0?
requests
Figure 17.7 (1) Sample Receive Abort Processing Flowchart
B'1001?
Start
Yes
Yes
[3]
No
No
and clear receive counter)
(disable KBBR reception
(receive abort request)
command transmission
To transmit operation
Clear I/O inhibit
Transmit data
(KCLKO = 1)
Processing 1
KCLKO = 0
Set start bit
(KDO = 0)
Retransmit
KBE = 0
(data)?
Yes
[1]
Rev. 3.00 Mar 21, 2006 page 501 of 788
[2]
Section 17 Keyboard Buffer Controller
No
[1] Read KBCRL, and if KBF = 1,
[2] Read KBCRH, and if the value of
[3] If the value of bits RXCR3 to
perform processing 1.
bits RXCR3 to RXCR0 is less than
B'1001, write 0 in KCLKO to abort
reception.
If the value of bits RXCR3 to
RXCR0 is B'1001 or greater, wait
until stop bit reception is
completed, then perform receive
data processing, and proceed to
the next operation.
RXCR0 is B'1001 or greater, the
parity bit is being received. With
the PS2 interface, a receive abort
request following parity bit
reception is disabled. Wait until
stop bit reception is completed,
perform receive data processing
and clear the KBF flag, then
proceed to the next operation.
and clear receive counter)
(disable KBBR reception
(enable KB operation)
To receive operation
Clear I/O inhibit
(KCLKO = 1)
KBE = 0
KBE = 1
REJ09B0300-0300