PD780701Y_15 Datasheet, PDF (32/66 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD780701Y, 780702Y
(3) Serial interface IIC0
The serial interface IIC0 has the I²C (Inter IC) bus mode (multimaster supported).
• I²C bus mode (multimaster supported)
This is an 8-bit data transfer mode between multiple devices using two lines: serial clock line (SCL0) and
serial data bus line (SDA0).
This mode complies with the I²C bus format, and can output “start condition”, “data”, and “stop condition”
during transmission via the serial data bus. These data are automatically detected by hardware during
reception.
Since the SCL0 and SDA0 are open-drain outputs in IIC0, pull-up resistors for the serial clock line and the
serial data bus line are required.
SDA0/P71
Figure 4-15. Block Diagram of Serial Interface IIC0
Slave address
register 0 (SVA0)
Noise
elimination
circuit
Match
signal
IIC0 shift
register (IIC0)
Internal bus
IIC0 control
register (IICC0)
IIC0 status register
(IICS0)
MSTS0 ALD0 EXC0 COI0 TRC0 ACKD0 STD0 SPD0
IICE0 LREL0 WREL0 SPIE0 WTIM0 ACKE0 STT0 SPT0
CLEAR
SET
SO0
D ^latch
CL01,
CL00
N-ch open-drain
output
SCL0/P72
Noise
elimination
circuit
Data hold
time correction
circuit
Acknowledge
detection circuit
Acknowledge
detection circuit
Start condition
detection circuit
Wake-up
control circuit
Stop condition
detection circuit
Serial
clock counter
Interrupt request
signal generator
Serial clock
control circuit
Serial clock wait
control circuit
INTIIC0
fX
Prescaler
CLD0 DAD0 SMC0 DFC0 CL01 CL00
IIC0 transfer clock
select register (IICCL0)
Internal bus
30
Preliminary Product Information U13920EJ1V0PM00