HD64F3642AH Renesas Electronics America, HD64F3642AH Datasheet - Page 335
![IC H8 MCU FLASH 16K 64QFP](/photos/28/61/286103/64-bqfp__prqp0064gb-a_sml.jpg)
HD64F3642AH
Manufacturer Part Number
HD64F3642AH
Description
IC H8 MCU FLASH 16K 64QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD64F3644HV.pdf
(551 pages)
Specifications of HD64F3642AH
Core Processor
H8/300L
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
PWM, WDT
Number Of I /o
53
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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10.3.4
In asynchronous mode, serial communication is performed with synchronization provided
character by character. A start bit indicating the start of communication and one or two stop bits
indicating the end of communication are added to each character before it is sent.
SCI3 has separate transmission and reception units, allowing full-duplex communication. As the
transmission and reception units are both double-buffered, data can be written during transmission
and read during reception, making possible continuous transmission and reception.
Data Transfer Format: The general data transfer format in asynchronous communication is
shown in figure 10.8.
Serial
In asynchronous communication, the communication line is normally in the mark state (high
level). SCI3 monitors the communication line and when it detects a space (low level), identifies
this as a start bit and begins serial data communication.
One transfer data character consists of a start bit (low level), followed by transmit/receive data
(LSB-first format, starting from the least significant bit), a parity bit (high or low level), and
finally one or two stop bits (high level).
In asynchronous mode, synchronization is performed by the falling edge of the start bit during
reception. The data is sampled on the 8th pulse of a clock with a frequency 16 times the bit period,
so that the transfer data is latched at the center of each bit.
data
Start
1 bit
bit
Operation in Asynchronous Mode
(LSB)
Figure 10.8 Data Format in Asynchronous Communication
One transfer data unit (character or frame)
Transmit/receive data
7 or 8 bits
(MSB)
Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 313 of 526
or none
Parity
1 bit
bit
bit(s)
Stop
1 or 2 bits
REJ09B0326-0600
Mark
state
1
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