R5F21257SYFP#U0 Renesas Electronics America, R5F21257SYFP#U0 Datasheet - Page 321

• 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: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 15.11
• Example of receive timing when transfer data is 8 bits long (parity disabled, one stop bit)
UiBRG output
UiC1 register
RE bit
RXDi
Transfer clock
UiC1 register
RI bit
SiRIC register
IR bit
Feb 29, 2008
Receive Timing Example in UART Mode
The above timing diagram applies when the register bits are set as follows:
• UiMR register PRYE bit = 0 (parity disabled)
• UiMR register STPS bit = 0 (1 stop bit)
i = 0 or 1
1
0
1
0
1
0
Reception triggered when transfer clock
is generated by falling edge of start bit
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Start bit
Determined to be “L” Receive data taken in
D0
Set to 0 when interrupt request is accepted, or set by a program
D1
Transferred from UARTi receive
register to UiRB register
D7
Stop bit
15. Serial Interface