Users Manual
Table Of Contents
- 34. IrDA Interface
- 35. I2C-bus Interface (RIICa)
- 35.1 Overview
- 35.2 Register Descriptions
- 35.2.1 I2C-bus Control Register 1 (ICCR1)
- 35.2.2 I2C-bus Control Register 2 (ICCR2)
- 35.2.3 I2C-bus Mode Register 1 (ICMR1)
- 35.2.4 I2C-bus Mode Register 2 (ICMR2)
- 35.2.5 I2C-bus Mode Register 3 (ICMR3)
- 35.2.6 I2C-bus Function Enable Register (ICFER)
- 35.2.7 I2C-bus Status Enable Register (ICSER)
- 35.2.8 I2C-bus Interrupt Enable Register (ICIER)
- 35.2.9 I2C-bus Status Register 1 (ICSR1)
- 35.2.10 I2C-bus Status Register 2 (ICSR2)
- 35.2.11 Slave Address Register Ly (SARLy) (y = 0 to 2)
- 35.2.12 Slave Address Register Uy (SARUy) (y = 0 to 2)
- 35.2.13 I2C-bus Bit Rate Low-Level Register (ICBRL)
- 35.2.14 I2C-bus Bit Rate High-Level Register (ICBRH)
- 35.2.15 I2C-bus Transmit Data Register (ICDRT)
- 35.2.16 I2C-bus Receive Data Register (ICDRR)
- 35.2.17 I2C-bus Shift Register (ICDRS)
- 35.3 Operation
- 35.4 SCL Synchronization Circuit
- 35.5 SDA Output Delay Function
- 35.6 Digital Noise Filters
- 35.7 Address Match Detection
- 35.8 Automatic Low-Hold Function for SCL
- 35.9 Arbitration-Lost Detection Functions
- 35.10 Start Condition/Restart Condition/Stop Condition Generating Function
- 35.11 Bus Hanging
- 35.12 SMBus Operation
- 35.13 Interrupt Sources
- 35.14 Initialization of Registers and Functions When a Reset is Applied or a Condition is Detected
- 35.15 Event Link Function (Output)
- 35.16 Usage Notes
- 36. CAN Module (RSCAN)
R01UH0823EJ0110 Rev.1.10 Page 1142 of 1852
Nov 30, 2020
RX23W Group 35. I
2
C-bus Interface (RIICa)
For 10-bit address format: SARUy.FS bit = 1
• When the received slave address does not match a value of (11110b + SARUy.SVA[1:0] bits) with the
ICSER.SARyE bit set to 1 (slave address y detection enabled)
This flag is set to 0 at the rising edge of the ninth SCL in the first byte.
• When the received slave address matches a value of (11110b + SARUy.SVA[1:0] bits) and the following address
does not match the SARLy value with the ICSER.SARyE bit set to 1 (slave address y detection enabled)
This flag is set to 0 at the rising edge of the ninth SCL in the second byte.
GCA Flag (General Call Address Detection Flag)
[Setting condition]
• When the received slave address matches the general call address (0000 000b + 0 (write)) with the ICSER.GCAE
bit set to 1 (general call address detection is enabled)
This flag is set to 1 at the rising edge of the ninth SCL in the first byte.
[Clearing conditions]
• When 0 is written to the GCA flag after reading GCA flag to be 1
• When a stop condition is detected
• When the received slave address does not match the general call address (0000 000b + 0 (write)) with the
ICSER.GCAE bit set to 1 (general call address detection is enabled)
This flag is set to 0 at the rising edge of the ninth SCL in the first byte.
• When 1 is written to the ICCR1.IICRST bit to apply an RIIC reset or an internal reset
DID Flag (Device-ID Address Detection Flag)
[Setting condition]
• When the first byte received immediately after a start condition or restart condition is detected matches a value of
(device ID (1111 100b) + 0 (write)) with the ICSER.DIDE bit set to 1 (device-ID address detection is enabled)
This flag is set to 1 at the rising edge of the ninth SCL in the first byte.
[Clearing conditions]
• When 0 is written to the DID flag after reading DID flag to be 1
• When a stop condition is detected
• When the first byte received immediately after a start condition or restart condition is detected does not match a
value of (device ID (1111 100b)) with the ICSER.DIDE bit set to 1 (device-ID address detection is enabled)
This flag is set to 0 at the rising edge of the ninth SCL in the first byte.
• When the first byte received immediately after a start condition or restart condition is detected matches a value of
(device ID (1111 100b) + 0 (write)) and the second byte does not match any of slave addresses 0 to 2 with the
ICSER.DIDE bit set to 1 (device-ID address detection is enabled)
This flag is set to 0 at the rising edge of the ninth SCL in the second byte.
• When 1 is written to the ICCR1.IICRST bit to apply an RIIC reset or an internal reset
HOA Flag (Host Address Detection Flag)
[Setting condition]
• When the received slave address matches the host address (0001 000b) with the ICSER.HOAE bit set to 1 (host
address detection is enabled)
This flag is set to 1 at the rising edge of the ninth SCL in the first byte.
[Clearing conditions]
• When 0 is written to the HOA flag after reading HOA flag to be 1
• When a stop condition is detected
• When the received slave address does not match the host address (0001 000b) with the ICSER.HOAE bit set to 1