R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 587

• Manufacturer Part Number: R5F21346CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/34Cr

Specifications of R5F21346CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 43
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 554 of 723
26.4.4
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 26.9 and 26.10 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), and set bits WAIT and MLS in the
(2) When the slave address matches at the first frame after detecting the start condition, the slave device
(3) When the TDRE bit in the ICDRT register is set to 1 after the last transmit data is written to the ICDRT
(4) Set the TRS bit to 0 and dummy read the ICDRR register to end the process. This will release the SCL
(5) Set the TDRE bit to 0.
ICMR register and bits CKS0 to CKS3 in the ICCR1 register (initial setting). Then, 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 rising edge 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.
signal.
Slave Transmit Operation
2
C bus Interface Mode).
26. I
2
C bus Interface