UPD70F3451GC-UBT-A Renesas Electronics America, UPD70F3451GC-UBT-A Datasheet - Page 799

• Manufacturer Part Number: UPD70F3451GC-UBT-A
• Description: MCU 32BIT 128KB FLASH 80LQFP
• Manufacturer: Renesas Electronics America
• Series: V850E/Ix3r

Specifications of UPD70F3451GC-UBT-A

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: CSI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3.5 V ~ 5.5 V
• Data Converters: A/D 10x12b, 4x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(5) Example of continuous transmission processing flow in FIFO mode (CPU control)
Notes 1.
Set UARTB-related registers
Figure 15-16. Example of Continuous Transmission Processing Flow in FIFO Mode (CPU Control)
INTUBTIF interrupt = 1?
Write transmit FIFO
UBTXE = 1 (UBCTL0)
2.
3.
START
Write more transmit data than the number set as the trigger by the UBFIC2.UBTT3 to
UBFIC2.UBTT0 bits to transmit FIFO.
This is the case where transmission is ended (transmit FIFO and the transmit shift register become
empty) before the next transmit data is written. To continue data transmission, clear the INTUBTIF
and INTUBTIT signals and write the next data to transmit FIFO.
In the pending mode (UBFIC0.UBITM bit = 0), write as many transmit data as the number set as
the trigger by the UBFIC2.UBTT3 to UBFIC2.UBTT0 bits of to transmit FIFO. In the pointer mode
(UBITM bit = 1), reference the UBFIS1.UBTB4 to UBFIS1.UBTB0 bits and write as many data as
the number of empty bytes in transmit FIFO to transmit FIFO.
Write 16-byte data to fully use the 8-bit × 16-stage FIFO function.
Yes
Note 1
CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE B (UARTB)
: Write transmit data
: Enable transmission
No
INTUBTIT interrupt = 1?
INTUBTIF interrupt = 1?
Transmission ended?
UBTXE = 0 (UBCTL0)
Clear transmit FIFO
END
Yes
Yes
Yes
User’s Manual U18279EJ3V0UD
: Transmission ended?
No
No
No
Note 2
Write transmit FIFO
Note 3
: Writing to transmit FIFO enabled?
: Disable transmission
: Transmission ended?
: Writing all transmit data ended?
797