HD6473258P10V Renesas Electronics America, HD6473258P10V Datasheet - Page 191

• Manufacturer Part Number: HD6473258P10V
• Description: MCU 5V 32K PB-FREE 64-DIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/325r

Specifications of HD6473258P10V

• Core Size: 8-Bit
• Program Memory Size: 32KB (32K x 8)
• Oscillator Type: External
• Core Processor: H8/300
• Speed: 10MHz
• Connectivity: SCI, UART/USART
• Number Of I /o: 53
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-DIP
• No. Of I/o's: 53
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 3
• Digital Ic Case Style: DIP
• Supply Voltage: RoHS Compliant
• Controller Family/series: H8/330
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Transmitting and receiving operations in the two modes are described next.
9.3.2 Asynchronous Mode
In asynchronous mode, each character is individually synchronized by framing it with a start bit
and stop bit.
Full duplex data transfer is possible because the SCI has independent transmit and receive sections.
Double buffering in both sections enables the SCI to be programmed for continuous data transfer.
Figure 9-2 shows the general format of one character sent or received in the asynchronous mode.
The communication channel is normally held in the mark state (high). Character transmission or
reception starts with a transition to the space state (low).
The first bit transmitted or received is the start bit (low). It is followed by the data bits, in which
the least significant bit (LSB) comes first. The data bits are followed by the parity bit, if present,
then the stop bit or bits (high) confirming the end of the frame.
In receiving, the SCI synchronizes on the falling edge of the start bit, and samples each bit at the
center of the bit (at the 8th cycle of the internal serial clock, which runs at 16 times the bit rate).
(1) Data Format: Table 9-7 lists the data formats that can be sent and received in asynchronous
mode. Eight formats can be selected by bits in the SMR.
Start bit
1 bit
D0
Figure 9-2. Data Format in Asynchronous Mode
D1
7 or 8 bits
One character
184
Dn
0 or 1 bit
Parity bit
Fig 9-2
1 or 2 bits
Stop bit
Idle state
(mark)