Datasheet

Multi-Master IIC Interface (MMIIC)
Data Sheet MC68HC908LJ24/LK24 — Rev. 2.1
322 Multi-Master IIC Interface (MMIIC) Freescale Semiconductor
MMAD[7:1] — Multi-Master Address
These seven bits represent the MMIIC interface’s own specific slave
address when in slave mode, and the calling address when in master
mode. Software must update MMAD[7:1] as the calling address while
entering master mode and restore its own slave address after master
mode is relinquished. This register is cleared as $A0 upon reset.
MMEXTAD — Multi-Master Expanded Address
This bit is set to expand the address of the MMIIC in slave mode.
When set, the MMIIC will acknowledge the following addresses from
a calling master: $MMAD[7:1], 0000000, and 0001100.
Reset clears this bit.
1 = MMIIC responds to the following calling addresses:
$MMAD[7:1], 0000000, and 0001100.
0 = MMIIC responds to address $MMAD[7:1]
For example, when MMADR is configured as:
The MMIIC module will respond to the calling address:
or the general calling address:
or the calling address:
NOTE: bit-0 of the 8-bit calling address is the MMRW bit from the calling master.
MMAD7 MMAD6 MMAD5 MMAD4 MMAD3 MMAD2 MMAD1 MMEXTAD
11010101
Bit 765432Bit 1
1101010
0000000
0001100