DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 491

• 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: -

12.5
The SCI has four interrupt sources: transmit end (TEI), receive error (ERI), receive-data-full
(RXI), and transmit-data-empty (TXI) interrupt requests.
Table 12.17 shows the interrupt sources. The interrupt sources are enabled or disabled by means of
the TIE, RIE, and TEIE bits in SCSCR and the EIO bit in SCSPTR. A separate interrupt request is
sent to the interrupt controller for each of these interrupt sources.
When the TDRE flag in the serial status register (SCSSR) is set to 1, a TDR empty interrupt
request is generated. When the RDRF flag in SCSSR is set to 1, an RDR full interrupt request is
generated. When the ORER, FER, or PER flag in SCSSR is set to 1, an ERI interrupt request is
generated. When the TEND flag in SCSSR is set to 1, a TEI interrupt request is generated.
The TXI interrupt indicates that transmit data can be written, and the TEI interrupt indicates that
transmission has been completed.
Table 12.17 SCI Interrupt Sources
Interrupt Source
ERI
RXI
TXI
TEI
SCI Interrupt Sources
Description
Interrupt caused by receive error (ORER, FER, or PER)
Interrupt caused by receive data full (RDRF)
Interrupt caused by transmit data empty (TDRE)
Interrupt caused by transmit end (TENT)
Rev. 5.00 Mar. 06, 2009 Page 471 of 770
REJ09B0243-0500