MC68HC05L28 Datasheet, PDF (94/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

Clear MIF
No
Master mode?
A
Yes
TX
RX
TX/ RX?
Last byte
Yes
transmitted?
No
No
8
RXAK = 0?
Yes
Last byte to ^Yes
be read?
No
Yes _{Second last byte}
to be read?
No
Write next byte to
MDR
Set TXAK = 1
Generate STOP
signal
Generate STOP
signal
Read data from
MDR and store
RTI
MOTOROLA
8-14
Figure 8-3 Example of a typical I²C-bus interrupt routine
I²C-BUS
TPG
MC68HC05L28