MC68HC05L28 Datasheet, PDF (95/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

A
Clear MAL
No
MAAS = 1?
Yes
Yes
Arbitration lost?
No
Yes
MAAS = 1?
No
Yes
SRW = 1?
RX
TX / RX?
No
TX
8
Set TX mode
Set RX mode
Yes
ACK from receiver?
No
Write to MDR
Dummy read from
MDR
TX next byte
Switch to RX
mode
Read MDR and
store
Dummy read from
MDR
RTI
Figure 8-3 Example of a typical I²C-bus interrupt routine (Continued)
MC68HC05L28
I²C-BUS
TPG
MOTOROLA
8-15