R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 163

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/18 Group, R8C/19 Group
Rev.1.30
REJ09B0222-0130
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 two 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 15.6 show the Registers Associated with UARTi.
Figure 15.1
(UART0)
(UART1)
RXD0
RXD1
CLK0
CLK1 to CLK0 = 00b
CLK1 to CLK0
f32
f32
f1
f8
f1
f8
Apr 14, 2006
reversing
= 01b
= 10b
= 00b
= 01b
= 10b
polarity
circuit
CLK
UARTi (i = 0 or 1) Block Diagram
Internal
Clock synchronous type
(when internal clock is selected)
CKDIR = 0
Internal
External
CKDIR = 1
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U0BRG register
1/(n0+1)
1/(n1+1)
U1BRG
register
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
Transmission
control circuit
Transmission
control circuit
control circuit
Reception
CKDIR = 0
CKDIR = 1
circuit
Receive clock
Transmit clock
Receive
clock
Transmit
clock
Transmit/
Transmit/
receive
receive
unit
unit
15. Serial Interface
TXD0
TXD1