HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 605

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

16.4.2
In asynchronous mode, each transmitted or received character begins with a start bit and ends with
a stop bit. Serial communication is synchronized one character at a time. Figure 16.2 shows the
general format of asynchronous serial communication.
In asynchronous serial communication, the communication line is normally held in the mark
(high) state. The SCIF monitors the line and starts serial communication when the line goes to the
space (low) state, indicating a start bit. One serial communication character consists of a start bit
(low), data (LSB first), parity bit (high/low), and stop bit (high), in this order. In asynchronous
mode, the SCIF synchronizes at the falling edge of the start bit during reception. The SCIF
samples each data bit on the eighth pulse of a clock with a frequency 16 times the bit rate.
Therefore, communication data is latched at the center of each bit.
Serial
data
1
Serial Operation in Asynchronous Mode
Start
1 bit
bit
0
Figure 16.2 Data Format in Asynchronous Communication
(Example of 8-Bit Data with Parity and 2 Stop Bits)
D0
D1
One unit of communication data (character or frame)
D2
Transmit/Receive data
7 bits or 8 bits
D3
Section 16 Serial Communication Interface with FIFO (SCIF)
D4
D5
Rev. 1.00 Dec. 27, 2005 Page 561 of 932
D6
D7
1 bit or
Parity
no bit
0/1
bit
Idle state (mark state)
1
Stop bit
REJ09B0269-0100
1 bit or
2 bits
1
1