R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 598

• 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 565 of 723
Figure 26.19
Note:
1. For 1 byte of data reception, skip steps (2) to (6) after (1) and jump to process step (7).
Process step (8) is a dummy read from the ICDRR register.
ICSR register
ICIER register ACKBT bit ← 0
ICIER register
Register Setting Example in Slave Receive Mode (I
Read RDRF bit in ICSR register
Read RDRF bit in ICSR register
Dummy read ICDRR register
No
No
Read ICDRR register
Read ICDRR register
Read ICDRR register
Slave receive mode
Last receive - 1?
Yes
RDRF = 1?
RDRF = 1?
ACKBT bit ← 1
AAS bit ← 0
End
No
Yes
Yes
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(1) Set the AAS bit to 0.
(2) Set the ACKBT bit to the transmit device.
(3) Dummy read the ICDRR register.
(4) Wait until 1 byte is received.
(5) Determine (last receive - 1).
(6) Read the receive data.
(7) Set the ACKBT bit of the last byte.
(8) Read the receive data of (last byte - 1).
(9) Wait until the last byte is received.
(10) Read the receive data of the last byte.
2
C bus Interface Mode)
(1)
26. I
2
C bus Interface
(1)