DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 500
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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Company:
Part Number:
DF2357F20
Manufacturer:
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Quantity:
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Part Number:
DF2357F20IV
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14.2.4
TDR is an 8-bit register that stores data for serial transmission.
When the SCI detects that TSR is empty, it transfers the transmit data written in TDR to TSR and starts serial
transmission. Continuous serial transmission can be carried out by writing the next transmit data to TDR during serial
transmission of the data in TSR.
TDR can be read or written to by the CPU at all times.
TDR is initialized to H'FF by a reset, and in standby mode or module stop mode.
14.2.5
SMR is an 8-bit register used to set the SCI’s serial transfer format and select the baud rate generator clock source.
SMR can be read or written to by the CPU at all times.
SMR is initialized to H'00 by a reset, and by putting the device in standby mode or module stop mode. In the H8S/2398,
H8S/2394, H8S/2392, and H8S/2390, however, the value in SMR is initialized to H'00 by a reset, or in hardware standby
mode, but SMR retains its current state when the device enters software standby mode or module stop mode.
Bit 7—Communication Mode (C/A): Selects asynchronous mode or clocked synchronous mode as the SCI operating
mode.
Bit 6—Character Length (CHR): Selects 7 or 8 bits as the data length in asynchronous mode. In clocked synchronous
mode, a fixed data length of 8 bits is used regardless of the CHR setting.
Note: * When 7-bit data is selected, the MSB (bit 7) of TDR is not transmitted, and it is not possible to choose between
Rev.6.00 Oct.28.2004 page 470 of 1016
REJ09B0138-0600H
Bit
Initial value :
R/W
Bit
Initial value :
R/W
LSB-first or MSB-first transfer.
Transmit Data Register (TDR)
Serial Mode Register (SMR)
Bit 7
C/A
0
1
Bit 6
CHR
0
1
:
:
:
:
R/W
R/W
C/A
7
1
7
0
Description
Asynchronous mode
Clocked synchronous mode
Description
8-bit data
7-bit data*
CHR
R/W
R/W
6
1
6
0
R/W
R/W
PE
5
1
5
0
R/W
R/W
O/E
4
1
4
0
STOP
R/W
R/W
3
1
3
0
R/W
R/W
MP
2
1
2
0
CKS1
R/W
R/W
1
1
1
0
CKS0
R/W
R/W
0
1
0
0
(Initial value)
(Initial value)
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