DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 523
DF2357F20
Manufacturer Part Number
DF2357F20
Description
IC H8S MCU FLASH 5V 128K 128QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Datasheet
1.D12392F20V.pdf
(1049 pages)
Specifications of DF2357F20
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
87
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2357F20
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
DF2357F20IV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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In serial transmission, the SCI operates as described below.
[1] The SCI monitors the TDRE flag in SSR, and if is 0, recognizes that data has been written to TDR, and transfers the
[2] After transferring data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts transmission.
Serial data transmission (asynchronous mode)
Figure 14-5 shows a sample flowchart for serial transmission.
The following procedure should be used for serial data transmission.
data from TDR to TSR.
If the TIE bit is set to 1 at this time, a transmit data empty interrupt (TXI) is generated.
The serial transmit data is sent from the TxD pin in the following order.
[a] Start bit:
One 0-bit is output.
and clear TDRE flag in SSR to 0
Write transmit data to TDR
Read TDRE flag in SSR
Read TEND flag in SSR
Clear TE bit in SCR to 0
All data transmitted?
Start transmission
Clear DR to 0 and
Break output?
set DDR to 1
Initialization
TEND= 1
TDRE=1
Figure 14-5 Sample Serial Transmission Flowchart
<End>
Yes
Yes
Yes
Yes
No
No
No
No
[1]
[2]
[3]
[4]
[1] SCI initialization:
[2] SCI status check and transmit data
[3] Serial transmission continuation
[4] Break output at the end of serial
The TxD pin is automatically
designated as the transmit data
output pin.
After the TE bit is set to 1, a frame
of 1s is output, and transmission is
enabled.
write:
Read SSR and check that the
TDRE flag is set to 1, then write
transmit data to TDR and clear the
TDRE flag to 0.
procedure:
To continue serial transmission,
read 1 from the TDRE flag to
confirm that writing is possible,
then write data to TDR, and then
clear the TDRE flag to 0. Checking
and clearing of the TDRE flag is
automatic when the DMAC or DTC
is activated by a transmit data
empty interrupt (TXI) request, and
data is written to TDR.
transmission:
To output a break in serial
transmission, set DDR for the port
corresponding to the TxD pin to 1,
clear DR to 0, then clear the TE bit
in SCR to 0.
Rev.6.00 Oct.28.2004 page 493 of 1016
REJ09B0138-0600H
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