HD6417011VX20V Renesas Electronics America, HD6417011VX20V Datasheet - Page 222
HD6417011VX20V
Manufacturer Part Number
HD6417011VX20V
Description
MPU 5V 0K 100-QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7010r
Datasheet
1.HD6417011VX20V.pdf
(294 pages)
Specifications of HD6417011VX20V
Core Processor
SH-2
Core Size
32-Bit
Speed
20MHz
Connectivity
EBI/EMI, SCI
Peripherals
POR, PWM
Number Of I /o
11
Program Memory Type
ROMless
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 7x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417011VX20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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12.3.2
In the 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.
The transmitting and receiving sections of the SCI are independent, so full duplex communication
is possible. The transmitter and receiver are both double buffered, so data can be written and read
while transmitting and receiving are in progress, enabling continuous transmitting and receiving.
Figure 12.2 shows the general format of asynchronous serial communication. In asynchronous
serial communication, the communication line is normally held in the marking (high) state. The
SCI monitors the line and starts serial communication when the line goes to the space (low) state,
indicating a start bit. One serial character consists of a start bit (low), data (LSB first), parity bit
(high or low), and stop bit (high), in that order.
When receiving in the asynchronous mode, the SCI synchronizes on the falling edge of the start
bit. The SCI samples each data bit on the eighth pulse of a clock with a frequency 16 times the bit
rate. Receive data is latched at the center of each bit.
212
Figure 12.2 Data Format in Asynchronous Communication (Example: 8-bit Data with
Serial
data
Operation in Asynchronous Mode
1
1 bit
Start
bit
0
(LSB)
One unit of communication data (characters or frames)
D0
D1
Transmit/receive data
D2
Parity and Two Stop Bits)
7 or 8 bits
D3
D4
D5
D6
(MSB)
D7
Idling (marking state)
Parity
no bit
1 or
0/1
bit
1
2 bits
Stop
1 or
bit
1
1
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