r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 402

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
19. Serial Interface (UART0)
The serial interface consists of two channels: UART0_0 and UART0_1.
This chapter describes these channels as UART0 unless there are differences among them.
19.1
Table 19.1
Clock
synchronous
serial I/O
mode
Clock
asynchronous
serial I/O
mode
Interrupt sources
Each UART0 channel is independent and has a dedicated timer for generating a transfer clock. It supports two
modes: Clock synchronous serial I/O mode and clock asynchronous serial I/O (UART) mode.
Table 19.1 lists the UART0 Specifications. Figure 19.1 shows the UART0 Block Diagram. Figure 19.2 shows the
Transmit/Receive Unit Block Diagram. Table 19.2 lists the UART0 Pin Configuration.
Overview
Item
Preliminary document
Specifications in this document are tentative and subject to change.
UART0 Specifications
Transfer data
format
Transfer clock
Error detection Overrun error
Transfer data
format
Transfer clock
Error detection Overrun error, framing error, parity error, error sum flag
Transfer data length: 8 bits
• The CKDIR bit in the U0MR register is 0 (internal clock): fi/2 (n + 1)
• The CKDIR bit in the U0MR register is 1 (external clock):
• Character bits (transfer data): 7, 8, or 9 bits selectable
• Start bit: 1 bit
• Parity bit: Odd, even, or none selectable
• Stop bit: 1 or 2 bits selectable
• The CKDIR bit in the U0MR register is 0 (internal clock): fj/16 (n + 1)
• The CKDIR bit in the U0MR register is 1 (external clock): fEXT/16 (n + 1)
Transmit buffer empty or transmit complete interrupt (multiplexed), and receive
complete interrupt
fi = f1, f8, f32, or fC1
n: Value set in the U0BRG register (00h to FFh)
fEXT (input from the CLK pin)
fj = f1, f8, f32, or fC1
n: Value set in the U0BRG register (00h to FFh)
fEXT (input from the CLK pin)
n: Value set in the U0BRG register (00h to FFh)
Description
19. Serial Interface (UART0)
Page 371 of 725