HD6473837HV Renesas Electronics America, HD6473837HV Datasheet - Page 287
HD6473837HV
Manufacturer Part Number
HD6473837HV
Description
MCU 3/5V 60K PB-FREE 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD6473837HV.pdf
(562 pages)
Specifications of HD6473837HV
Core Processor
H8/300L
Core Size
8-Bit
Speed
5MHz
Connectivity
SCI
Peripherals
LCD, PWM
Number Of I /o
84
Program Memory Size
60KB (60K x 8)
Program Memory Type
OTP
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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10.4.4
In asynchronous communication mode, a start bit indicating the start of communication and a stop
bit indicating the end of communication are added to each character that is sent. In this way
synchronization is achieved for each character as a self-contained unit.
SCI3 consists of independent transmit and receive modules, giving it the capability of full duplex
communication. Both the transmit and receive modules have a double-buffer configuration,
allowing data to be read or written during communication operations so that data can be
transmitted and received continuously.
Transmit/Receive Formats
Figure 10.9 shows the general format for asynchronous serial communication.
The communication line in asynchronous communication mode normally stays at the high level, in
the “mark” state. SCI3 monitors the communication line, and begins serial data communication
when it detects a “space” (low-level signal), which is regarded as a start bit.
One character consists of a start bit (low level), transmit/receive data (in LSB-first order: starting
with the least significant bit), a parity bit (high or low level), and finally a stop bit (high level), in
this order.
In asynchronous data receiving, synchronization is with the falling edge of the start bit. SCI3
samples data on the 8th pulse of a clock that has 16 times the frequency of the bit rate, so each bit
of data is latched at its center.
Table 10.16 shows the 12 transmit/receive formats formats that can be selected in asynchronous
mode. The format is selected in the serial mode register (SMR).
270
Serial
data
Operation in Asynchronous Mode
Figure 10.9 Data Format in Asynchronous Serial Communication Mode
Start
1 bit
bit
(LSB)
One unit of data (character or frame)
Transmit or receive data
7 or 8 bits
(MSB)
Parity
none
1 bit
bit
or
Stop bit
1 or 2
bits
Mark
state
1
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