R5F21257SYFP#U0 Renesas Electronics America, R5F21257SYFP#U0 Datasheet - Page 323
![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
15.3
• When reading data from the UiRB (i = 0 or 1) register either in the clock synchronous serial I/O mode or in the
• When writing data to the UiTB register in the clock asynchronous serial I/O mode with 9-bit transfer data
Example (when reading receive buffer register):
Example (when reading transmit buffer register):
clock asynchronous serial I/O mode. Ensure the data is read in 16-bit units. When the high-order byte of the
UiRB register is read, bits PER and FER in the UiRB register and the RI bit in the UiC1 register are set to 0.
To check receive errors, read the UiRB register and then use the read data.
length, write data to the high-order byte first then the low-order byte, in 8-bit units.
Notes on Serial Interface
Feb 29, 2008
MOV.W
MOV.B
MOV.B
00A6H,R0
#XXH,00A3H
#XXH,00A2H
Page 304 of 485
; Read the U0RB register
; Write the high-order byte of U0TB register
; Write the low-order byte of U0TB register
15. Serial Interface
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