mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 301

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

17.7.2
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
MMIIC
Control Register 1 (MMCR1)
Address:
MMEN — MMIIC Enable
MMIEN — MMIIC Interrupt Enable
MMCLRBB — MMIIC Clear Busy Flag
Reset:
Read:
Write:
This bit is set to enable the Multi-master IIC module. When
MMEN = 0, module is disabled and all flags will restore to its power-
on default states. Reset clears this bit.
When this bit is set, the MMTXIF, MMRXIF, MMALIF, and MMNAKIF
flags are enabled to generate an interrupt request to the CPU. When
MMIEN is cleared, the these flags are prevented from generating an
interrupt request. Reset clears this bit.
Writing a logic 1 to this write-only bit clears the MMBB flag.
MMCLRBB always reads as a logic 0. Reset clears this bit.
1 = MMIIC module enabled
0 = MMIIC module disabled
1 = MMTXIF, MMRXIF, MMALIF, and/or MMNAKIF bit set will
0 = MMTXIF, MMRXIF, MMALIF, and/or MMNAKIF bit set will not
1 = Clear MMBB flag
0 = No affect on MMBB flag
MMEN
$0049
Bit 7
Figure 17-5. MMIIC Control Register 1 (MMCR1)
generate interrupt request to CPU
generate interrupt request to CPU
Multi-Master IIC Interface (MMIIC)
0
= Unimplemented
MMIEN
6
0
MMCLRBB
5
0
0
4
0
0
MMTXAK REPSEN
3
0
Multi-Master IIC Interface (MMIIC)
2
0
MMIIC I/O Registers
MMCRCBYTE
1
0
Data Sheet
SDASCL1
Bit 0
0
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