R5F21256SNFP#U0 Renesas Electronics America, R5F21256SNFP#U0 Datasheet - Page 307
R5F21256SNFP#U0
Manufacturer Part Number
R5F21256SNFP#U0
Description
IC R8C MCU FLASH 32K 52LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/25r
Datasheets
1.R5F211A2SPU0.pdf
(300 pages)
2.R5F21246SDFPU0.pdf
(61 pages)
3.R5F21246SDFPU0.pdf
(527 pages)
Specifications of R5F21256SNFP#U0
Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
POR, Voltage Detect, WDT
Number Of I /o
41
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
52-LQFP
For Use With
R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
R5F21256SNFP#U0R5F21256SNFP#ES
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
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.
UARTi has two modes: clock synchronous serial I/O mode and 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
CLK1 to CLK0 = 00b
CLK1 to CLK0 = 00b
f32
f32
f1
f1
f8
f8
Feb 29, 2008
= 01b
= 10b
= 01b
= 10b
polarity
polarity
switch
switch
circuit
circuit
CLK
CLK
UARTi (i = 0 or 1) Block Diagram
TXD1EN
Clock synchronous type
(when internal clock is selected)
CKDIR = 0
Internal
CKDIR = 0
Internal
External
CKDIR = 1
External
CKDIR = 1
Page 288 of 485
U1PINSEL
U0BRG register
U1BRG register
1/(n0+1)
1/(n0+1)
1/16
1/16
1/16
1/16
1/2
1/2
Clock synchronous type
(when internal clock is selected)
U1PINSEL
Clock synchronous type
(when internal clock is selected)
Clock synchronous type
(when external clock is selected)
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
synchronous type
synchronous type
Clock
Clock
Clock
Clock
Reception control
Reception control
Transmission
control circuit
Transmission
control circuit
CKDIR = 0
CKDIR = 1
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
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