R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 384

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#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 ~ 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: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 16.48
Feb 29, 2008
ICSR register
ICSR register
ICCR1 register
ICSR register
Write transmit data to ICDRT register
Write transmit data to ICDRT register
Example of Register Setting in Slave Transmit Mode (I
Read TDRE bit in ICSR register
Read TEND bit in ICSR register
Dummy read in ICDRR register
No
No
No
Slave transmit mode
TDRE = 1 ?
TEND = 1 ?
Last byte ?
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TEND bit ← 0
TDRE bit ← 0
AAS bit ← 0
End
TRS bit ← 0
Yes
Yes
Yes
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(1) Set the AAS bit to 0
(2) Set the transmit data (except the last byte)
(3) Wait until the ICRDT register is empty
(4) Set the transmit data of the last byte
(5) Wait until the last byte is transmitted
(6) Set the TEND bit to 0
(7) Set to slave receive mode
(8) Dummy read the ICDRR register to release the
(9) Set the TDRE bit to 0
SCL signal
16. Clock Synchronous Serial Interface
2
C bus Interface Mode)