DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 470

• 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: -

Transmitting Serial Data (Asynchronous Mode):
Figure 12.4 shows a sample flowchart for serial transmission.
Use the following procedure for serial data transmission after enabling the SCI for transmission.
Rev. 5.00 Mar. 06, 2009 Page 450 of 770
REJ09B0243-0500
and clear TDRE bit in SCSSR to 0
Write transmit data in SCTDR
Read TDRE flag in SCSSR
Read TEND flag in SCSSR
Clear TE bit in SCSCR to 0
Clear SPB0DT to 0 and
Figure 12.4 Sample Flowchart for Transmitting Serial Data
Start of transmission
All data transmitted?
End of transmission
set SPB0IO to 1
Break output?
TDRE = 1?
TEND = 1?
Yes
Yes
Yes
Yes
No
No
No
No
[1] SCI status check and transmit data
[2] Serial transmission continuation
[3] Break output at the end of serial
write:
Read SCSSR and check that the
TDRE flag is set to 1, then write
transmit data to SCTDR, 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
SCTDR, and then clear the TDRE
flag to 0.
transmission:
To output a break in serial
transmission, clear the SPB0DT bit to
0 and set the SPB0IO bit to 1 in
SCSPTR, then clear the TE bit in
SCSCR to 0.