r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 559

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
26. I
The I
I
26.1
2
Table 26.1
Note:
C bus.
Communication formats • I
I/O pins
Transfer clocks
Receive error detection • Overrun error detection (clock synchronous serial format)
Interrupt sources
Selectable functions
Table 26.1 lists the I
Figure 26.2 shows the External Circuit Connection Example of Pins SCL and SDA, Table 26.2 lists the Pin
Configuration of I
1. All sources use one interrupt vector for I
2
2
C bus interface is the circuit that performs serial communication based on the data transfer format of the Philips
C bus Interface
Overview
Item
I
2
C bus Interface Specifications
2
C bus Interface.
2
C bus Interface Specifications, Figure 26.1 shows an I
• Clock synchronous serial format
SCL (I/O): Serial clock I/O pin
SDA (I/O): Serial data I/O pin
• When the MST bit in the ICCR1 register is set to 0.
• When the MST bit in the ICCR1 register is set to 1.
• I
• Clock synchronous serial format ...... 4 sources
• I
• Clock synchronous serial format
• SDA digital delay
2
- Selectable as master/slave device.
- Continuous transmit/receive operation (because the shift register, transmit
- Start/stop conditions are automatically generated in master mode.
- Automatic loading of the acknowledge bit during transmission
- Bit synchronization/wait function (In master mode, the state of the SCL
- Support for direct drive of pins SCL and SDA (N-channel open-drain output)
- Continuous transmit/receive operation (because the shift register, transmit
External clock (input from the SCL pin)
Internal clock selected by bits CKS0 to CKS3 in the ICCR1 register and bits
IICTCTWI and IICTCHALF in the PINSR register (output from the SCL pin)
Indicates an overrun error during reception. When the last bit of the next unit
of data is received while the RDRF bit in the ICSR register is set to 1 (data in
the ICDRR register), the AL bit is set to 1.
2
Transmit data empty (including when slave address matches), end of
transmission, receive data full (including when slave address matches),
arbitration lost, NACK detection, and stop condition detection
Transmit data empty, end of transmission, receive data full, and overrun error
2
- Selectable output level for the acknowledge signal during reception.
- MSB-first or LSB-first selectable as the data transfer direction.
- Digital delay value for the SDA pin selectable by bits SDADLY0 to
C bus format
C bus format .................................. 6 sources
C bus format
data register, and receive data register are independent.)
signal is monitored per bit and the timing is synchronized automatically. If
the transfer is not possible yet, the SCL signal goes “L” and the interface
stands by.)
data register, and receive data register are independent.)
SDADLY1 in the PINSR register.
2
C bus interface.
Specification
2
C bus interface Block Diagram, and
(1)
(1)
26. I
Page 527 of 740
2
C bus Interface