MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 310

• Manufacturer Part Number: MC68HC908SR12CFA
• Description: MICROCONTROLLER 48 PIN
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908SR12CFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, Temp Sensor
• Number Of I /o: 31
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Q1145673

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