DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 481

• 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: -

Receiving Serial Data (Clock Synchronous Mode): Figure 12.12 shows a sample flowchart for
receiving serial data. Use the following procedure for serial data reception after enabling the SCIF
for reception.
When switching from asynchronous mode to clock synchronous mode, make sure that the ORER,
PER, and FER flags are all cleared to 0. If the FER or PER flag is set to 1, the RDRF flag will not
be set and data reception cannot be started.
No
No
Read receive data in SCRDR,
Figure 12.12 Sample Flowchart for Receiving Serial Data (1)
Read ORER flag in SCSSR
Read RDRF flag in SCSSR
Clear RE bit in SCSCR to 0
and clear RDRF flag
All data received?
Start of reception
End of reception
in SCSSR to 0
ORER = 1?
RDRF = 1?
No
Yes
Yes
Error handling
Yes
[1] Receive error handling:
[2] SCI status check and receive data read:
[3] Serial reception continuation procedure:
identify any error, perform the appropriate
error handling, then clear the ORER flag
to 0. Reception cannot be resumed while
the ORER flag is set to 1.
then read the receive data in SCRDR,
and clear the RDRF flag to 0. The
transition of the RDRF flag from 0 to 1
can also be identified by an RXI interrupt.
receive data register (SCRDR) and clear
the RDRF flag to 0 before the MSB (bit 7)
of the current frame is received.
Read the ORER flag in SCSSR to
Read SCSSR and check that RDRF = 1,
To continue serial reception, read the
Rev. 5.00 Mar. 06, 2009 Page 461 of 770
REJ09B0243-0500