DF2134AFA20V Renesas Electronics America, DF2134AFA20V Datasheet - Page 475
DF2134AFA20V
Manufacturer Part Number
DF2134AFA20V
Description
IC H8S/2100 MCU FLASH 80QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Datasheets
1.HEWH8E10A.pdf
(19 pages)
2.D12312SVTE25V.pdf
(341 pages)
3.DF2134AFA20V.pdf
(1063 pages)
Specifications of DF2134AFA20V
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
IrDA, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
58
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
80-QFP
For Use With
3DK2166 - DEV EVAL KIT H8S/2166
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2134AFA20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 475 of 1063
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15.3.2
In asynchronous mode, characters are sent or received, each preceded by a start bit indicating the
start of communication and followed by one or two stop bits indicating the end of communication.
Serial communication is thus carried out with synchronization established on a character-by-
character basis.
Inside the SCI, the transmitter and receiver are independent units, enabling full-duplex
communication. Both the transmitter and the receiver also have a double-buffered structure, so
that data can be read or written during transmission or reception, enabling continuous data
transfer.
Figure 15.2 shows the general format for asynchronous serial communication.
In asynchronous serial communication, the transmission line is usually held in the mark state (high
level). The SCI monitors the transmission line, and when it goes to the space state (low level),
recognizes a start bit and starts serial communication.
One serial communication character consists of a start bit (low level), followed by data (in LSB-
first order), a parity bit (high or low level), and finally one or two stop bits (high level).
In asynchronous mode, the SCI performs synchronization at the falling edge of the start bit in
reception. The SCI samples the data on the 8th pulse of a clock with a frequency of 16 times the
length of one bit, so that the transfer data is latched at the center of each bit.
Serial
data
1
Start
bit
1 bit
0
Operation in Asynchronous Mode
LSB
D0
Figure 15.2 Data Format in Asynchronous Communication
One unit of transfer data (character or frame)
D1
(Example with 8-Bit Data, Parity, Two Stop Bits)
D2
Transmit/receive data
D3
7 or 8 bits
D4
Section 15 Serial Communication Interface (SCI, IrDA)
D5
D6
Rev. 4.00 Jun 06, 2006 page 419 of 1004
MSB
D7
Parity
bit
1 bit,
or none
0/1
Stop bit(s)
1
1 or
2 bits
REJ09B0301-0400
1
Idle state
(mark state)
1
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