Panasonic MN101C77C, F77G user manual „Master Transmission Timing

Chapter 12 Serial Interface 3

„Master Transmission Timing

(1)		8-bit			(2)	(3)	8-bit
		transmission					transmission
SDA	1	2	. .	8	ACK		1	2	. .	8

SCL

Interrupt

IICBSY

Set data to SC3TRB Set data to SC3TRB

(1)Output start condition.

(2)Bus released period, ACK bit is received.

(3)Interrupt transaction.

-Disable start condition : SC3STE = 1 → 0

-Start communication : set data to SC3TRB

(4)Receive ACK bit.

(5)Interrupt transaction.

-Finish communication : clear the IICBSY flag.

(6)Generates stop condition.

Figure 12-3-16 Master Transmission Timing

(4) (5) (6)

ACK

Clear IICBSY flag

XII - 32 Operation