R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 395

• 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 365 of 589
Figure 22.19
22.6.1
(1)
(2)
(3)
Figure 22.19 shows a Sample Flowchart of Multiprocessor Data Transmission. Set the MPBT bit in the U2TB
register to 1 for ID transmission cycles. Set the MPBT bit in the U2TB register to 0 for data transmission cycles.
Other operations are the same as in universal asynchronous receiver/transmitter mode (UART mode).
Set the MPBT bit in the U2TB register
Read the TI bit in the U2C1 register
Multiprocessor Transmission
in the U2C1 register to 0
Write transmit data to
Read the TXEPT bit
in the U2C0 register
data transmission?
the U2TB register
Sample Flowchart of Multiprocessor Data Transmission
Set the TE bit
TXEPT = 1?
Continue
TI = 1?
Start
End
Yes
Yes
No
Yes
No
No
(1) Read the U2C1 register to confirm that the TI bit is
(2) When transmission completes, the TXEPT bit is set
(3) To continue data transmission, read that the TI bit is 1
set to 1. Then set the MPBT bit in the U2TB register
to 0 or 1 and write transmit data to the U2TB
register.
Writing data to the U2TB register sets the TI bit to 0
automatically.
to 1 automatically.
and write data to the U2TB register. Writing data to
the U2TB register sets the TI bit to 0 automatically.
22. Serial Interface (UART2)