R5F21292SNSP#U0 Renesas Electronics America, R5F21292SNSP#U0 Datasheet - Page 250

• Manufacturer Part Number: R5F21292SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21292SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521276S000BE - KIT DEV RSK-R8C/26-29
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
15. Serial Interface
The serial interface consists of two channels (UART0 and UART1). Each UARTi (i = 0 or 1) has an exclusive timer to
generate the transfer clock and operates independently.
Figure 15.1 shows a UARTi (i = 0 or 1) Block Diagram. Figure 15.2 shows a UARTi Transmit/Receive Unit.
UART0 has 2 modes: clock synchronous serial I/O mode and clock asynchronous serial I/O mode (UART mode).
UART1 has only clock asynchronous serial I/O mode (UART mode).
Figures 15.3 to 15.7 show the registers associated with UARTi.
Figure 15.1
(UART0)
(UART1)
RXD0
RXD1
CLK0
CLK1 to CLK0
CLK1 to CLK0
f32
f32
f1
f1
f8
f8
Sep 26, 2008
= 00b
= 01b
= 10b
= 00b
= 01b
= 10b
polarity
switch
circuit
CLK
UARTi (i = 0 or 1) Block Diagram
U1PINSEL
Clock synchronous type
(when internal clock is selected)
CKDIR = 0
Internal
External
CKDIR = 1
Page 231 of 441
U0BRG register
U1BRG register
1/(n0+1)
1/(n0+1)
1/16
1/16
1/16
1/16
1/2
Clock synchronous type
(when internal clock is selected)
Clock synchronous type
(when external clock is selected)
UART reception
UART transmission
UART reception
UART transmission
synchronous type
synchronous type
Clock
Clock
Reception control
Reception control
Transmission
control circuit
Transmission
control circuit
CKDIR = 0
CKDIR = 1
circuit
circuit
Receive
clock
Receive
clock
Transmit
clock
Transmit
clock
Transmit/
Transmit/
receive
receive
unit
unit
15. Serial Interface
TXD0
TXD1