R5F21256SNFP#U0 Renesas Electronics America, R5F21256SNFP#U0 Datasheet - Page 372

• Manufacturer Part Number: R5F21256SNFP#U0
• Description: IC R8C MCU FLASH 32K 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

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: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
16.3.3.4
In slave transmit mode, the slave device outputs the transmit data while the master device outputs the receive
clock and returns an acknowledge signal.
Figures 16.37 and 16.38 show the Operating Timing in Slave Transmit Mode (I
The transmit procedure and operation in slave transmit mode are as follows.
(1) Set the ICE bit in the ICCR1 register to 1 (transfer operation enabled). Set bits WAIT and MLS in the
(2) When the slave address matches at the 1st frame after detecting the start condition, the slave device
(3) When the TDRE bit in the ICDRT register is set to 1 after writing the last transmit data to the ICDRT
(4) The SCL signal is released by setting the TRS bit to 0 and performing a dummy read of the ICDRR
(5) Set the TDRE bit to 0.
Feb 29, 2008
ICMR register and bits CKS0 to CKS3 in the ICCR1 register (initial setting). Set bits TRS and MST in
the ICCR1 register to 0 and wait until the slave address matches in slave receive mode.
outputs the level set by the ACKBT bit in the ICIER register to the SDA pin at the rise of the 9th clock
cycle. At this time, if the 8th bit of data (R/W) is 1, bits TRS and TDRE in the ICSR register are set to 1,
and the mode is switched to slave transmit mode automatically. Continuous transmission is enabled by
writing transmit data to the ICDRT register every time the TDRE bit is set to 1.
register, wait until the TEND bit in the ICSR register is set to 1 while the TDRE bit is set to 1. When the
TEND bit is set to 1, set the TEND bit to 0.
register to end the process.
Slave Transmit Operation
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16. Clock Synchronous Serial Interface
2
C bus Interface Mode).