mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 310

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

Multi-Master IIC Interface (MMIIC)
17.7.8 MMIIC Frequency Divider Register (MMFDR)
Data Sheet
310
MMBR2
0
0
0
0
1
1
1
1
MMBR1
NOTE:
0
0
1
1
0
0
1
1
MMBR0
Address:
The three bits in the frequency divider register (MMFDR) selects the
divider to divide the bus clock to the desired baud rate for the MMIIC data
transfer.
Table 17-2
The frequency of the MMIIC baud rate is only guaranteed for 100kHz to
10kHz. The divider is available for the flexibility on bus frequency
selection.
0
1
0
1
0
1
0
1
Reset:
Read:
Write:
Table 17-2. MMIIC Baud Rate Selection
Figure 17-11. MMIIC Frequency Divider Register (MMFDR)
$004F
Bit 7
Divider
Multi-Master IIC Interface (MMIIC)
0
0
1280
2560
160
320
640
20
40
80
shows the divider values for MMBR[2:0].
= Unimplemented
6
0
0
3.125kHz
12.5kHz
6.25kHz
400kHz
200kHz
100kHz
50kHz
25kHz
8MHz
5
0
0
MMIIC Baud Rates for Bus Clocks:
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
1.5625kHz
3.125kHz
12.5kHz
6.25kHz
4
0
0
200kHz
100kHz
50kHz
25kHz
4MHz
3
0
0
0.78125kHz
1.5625kHz
3.125kHz
12.5kHz
6.25kHz
100kHz
MMBR2
50kHz
25kHz
2MHz
Freescale Semiconductor
2
1
MMBR1
1
0
0.78125kHz
1.5625kHz
0.3906kHz
3.125kHz
12.5kHz
6.25kHz
50kHz
25kHz
1MHz
MMBR0
Bit 0
0