DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 438

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

Specifications of DF71251AD50FPV

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.3.4
SCTDR is an 8-bit register that stores data for serial transmission. When the SCI detects that the
transmit shift register (SCTSR) is empty, it moves transmit data written in the SCTDR into
SCTSR and starts serial transmission. If the next transmit data has been written to SCTDR during
serial transmission from SCTSR, the SCI can transmit data continuously. SCTDR can always be
written or read to by the CPU.
12.3.5
SCSMR is an 8-bit register that specifies the SCI serial communication format and selects the
clock source for the baud rate generator.
The CPU can always read and write to SCSMR.
Rev. 5.00 Mar. 06, 2009 Page 418 of 770
REJ09B0243-0500
Bit
7
Transmit Data Register (SCTDR)
Serial Mode Register (SCSMR)
Bit Name
C/A
Initial value:
Initial value:
Initial
value
0
R/W:
R/W:
Bit:
Bit:
R/W
R/W
C/A
7
7
0
-
R/W
R/W
R/W
R/W
CHR
6
6
0
-
Description
Communication Mode
Selects whether the SCI operates in asynchronous or
clock synchronous mode.
0: Asynchronous mode
1: Clock synchronous mode (Channel 1 in the SH7124
R/W
R/W
PE
5
5
0
-
is not available.)
R/W
R/W
O/E
4
4
0
-
STOP
R/W
R/W
3
3
0
-
R/W
R/W
MP
2
2
0
-
R/W
R/W
1
1
0
-
CKS[1:0]
R/W
R/W
0
0
0
-