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 1176 of 1852
Nov 30, 2020
RX23W Group 35. I
2
C-bus Interface (RIICa)
Figure 35.28 Set/Clear Timing of the AASy and DID Flags during Reception of Device-ID Address
[Device-ID reception]
SCL0
SDA0
BBSY
AASy
DID
TRS
TDRE
RDRF
1234567891 89 123456789
S
1111100W#A
Device-ID address matches (1111 100b + W#)
Address A
Slave address matches
Received data (7-bit address/lower bits of 10-bit address)
Read ICDRR register
(Dummy read (7-bit address/lower bits of 10-bit address))
Sr
1111100RA
Device-ID address matches (1111 100b + R)
[When the address following a restart condition is not a device-ID address]
SCL0
SDA0
BBSY
AASy
DID
RDRF
1234567891 89 123456789
S
1111100W#A
Device-ID address matches (1111 100b + W#)
A
Slave address matches
Address
Received data (7-bit address/lower bits of 10-bit address)
Read ICDRR register
(Dummy read (7-bit address/lower bits of 10-bit address))
Sr
A7-bit slave address (for another slave) R/W#
Device-ID address does not match
Slave address does not match
[When the address before the device-ID address + R had not matched the slave address]
SCL0
SDA0
BBSY
AASy
DID
TDRE
1234567891 89 123456789
S
1111100RA#
Device-ID address matches (1111 100b + R)
Address A#
Sr
A#
The previous value is held
RDRF
1111100R
Device-ID address matches (1111 100b + R)
The following address is not compared