R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 605

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 27
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 575 of 589
33.10 Notes on Serial Interface (UARTi (i = 0 or 1))
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•
When reading data from the UiRB (i = 0 or 1) register either in clock synchronous serial I/O mode or in clock
asynchronous serial I/O mode, always read data in 16-bit units.
When the high-order byte of the UiRB register is read, bits PER and FER in the UiRB register and the RI bit in
the UiC1 register are set to 0.
To check receive errors, read the UiRB register and then use the read data.
When writing data to the UiTB register in clock asynchronous serial I/O mode with 9-bit transfer data length,
write data to the high-order byte first and then the low-order byte, in 8-bit units.
Program example to read the receive buffer register:
Program example to write to the transmit buffer register:
MOV.W
MOV.B
MOV.B
00A6H,R0
#XXH,00A3H
#XXH,00A2H
; Read the U0RB register
; Write to the high-order byte of the U0TB register
; Write to the low-order byte of the U0TB register
33. Usage Notes