CHAPTER 17 SERIAL INTERFACE IIC0 (
µ
PD780344Y, 780354Y SUBSERIES ONLY)
353
User’s Manual U15798EJ2V0UD
17.6 Timing Charts
When using the I
2
C bus mode, the master device outputs an address via the serial bus to select one of several
slave devices as its communication partner.
After outputting the slave address, the master device transmits the TRC0 bit (bit 3 of IIC status register 0 (IICS0))
that specifies the data transfer direction and then starts serial communication with the slave device.
Figures 17-21 and 17-22 show timing charts of the data communication.
IIC shift register 0 (IIC0)’s shift operation is synchronized with the falling edge of the serial clock (SCL0). The
transmit data is transferred to the SO0 latch and is output (MSB first) via the SDA0 pin.
Data input via the SDA0 pin is captured into IIC0 at the rising edge of SCL0.
Содержание mPD780344 Series
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