DF2218BR24V Renesas Electronics America, DF2218BR24V Datasheet - Page 459

• Manufacturer Part Number: DF2218BR24V
• Description: IC H8S/2218 MCU FLASH 112-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2218BR24V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 24MHz
• Connectivity: SCI, SmartCard, USB
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 6x10b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 112-LFBGA
• For Use With: HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)3DK2218-SS - KIT DEV H8S/2218 WINDOWS SIDESHW3DK2218 - DEV EVAL KIT H8S/2218
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.4
Figure 12.5 shows the general format for asynchronous serial communication. One frame consists
of a start bit (low level), followed by data (in LSB-first order), a parity bit (high or low level), and
finally stop bits (high level). In asynchronous serial communication, the transmission line is
usually held in the mark state (high level). The SCI monitors the transmission line. When the
transmission line goes to the space state (low level), the SCI recognizes a start bit and starts serial
communication. Inside the SCI, the transmitter and receiver are independent units, enabling full-
duplex. Both the transmitter and the receiver also have a double-buffered structure, so data can be
read from or written during transmission or reception, enabling continuous data transfer.
Serial
data
Operation in Asynchronous Mode
1
Start
bit
1 bit
0
Figure 12.5 Data Format in Asynchronous Communication
LSB
D0
(Example with 8-Bit Data, Parity, Two Stop Bits)
D1
One unit of transfer data (character or frame)
D2
Transmit/receive data
D3
7 or 8 bits
D4
D5
D6
Rev.7.00 Dec. 24, 2008 Page 403 of 698
MSB
D7
Parity
bit
1 bit,
or none
0/1
1
Stop bit
1 or
2 bits
1
REJ09B0074-0700
Idle state
(mark state)
1