R5F21257SYFP#U0 Renesas Electronics America, R5F21257SYFP#U0 Datasheet - Page 310
![MCU 2KB FLASH 48K 52-LQFP](/photos/28/61/286101/52-lqfp_sml.jpg)
R5F21257SYFP#U0
Manufacturer Part Number
R5F21257SYFP#U0
Description
MCU 2KB FLASH 48K 52-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/25r
Specifications of R5F21257SYFP#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
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
2.5K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 105°C
Package / Case
52-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 15.4
UARTi Bit Rate Register (i = 0 or 1)
UARTi Transmit/Receive Mode Register (i = 0 or 1)
b7
NOTES:
b7 b6 b5 b4
NOTE:
0
1.
2.
3.
1.
Write to this register w hile the serial I/O is neither transmitting nor receiving.
Use the MOV instruction to w rite to this register.
After setting the CLK0 to CLK1 bits of the UiC0 register, w rite to the UiBRG register.
Set the PD1_6 bit in the PD1 register to 0 (input).
Feb 29, 2008
b3 b2 b1 b0
Registers U0BRG to U1BRG and U0MR to U1MR
b0
Assuming the set value is n, UiBRG divides the count source by n+1
Bit Symbol
Symbol
U0BRG
U1BRG
Symbol
CKDIR
U0MR
U1MR
SMD0
SMD1
SMD2
PRYE
STPS
PRY
(b7)
Page 291 of 485
—
Serial I/O mode select bits
Internal/external clock select bit 0 : Internal clock
Stop bit length select bit
Odd/even parity select bit
Parity enable bit
Reserved bit
(1, 2, 3)
Address
Bit Name
00A0h
00A8h
Function
Address
00A1h
00A9h
b2 b1 b0
0 0 0 : Serial interface disabled
0 0 1 : Clock synchronous serial I/O mode
1 0 0 : UART mode transfer data 7 bits long
1 0 1 : UART mode transfer data 8 bits long
1 1 0 : UART mode transfer data 9 bits long
Other than above : Do not set.
1 : External clock
0 : 1 stop bit
1 : 2 stop bits
Enable w hen PRYE = 1
0 : Odd parity
1 : Even parity
0 : Parity disabled
1 : Parity enabled
Set to 0.
(1)
After Reset
Function
00h
00h
Setting Range
After Reset
00h to FFh
Undefined
Undefined
15. Serial Interface
WO
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
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