MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 523

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Address: OCCS_OSCTL – F120h base + 4h offset = F124h
Freescale Semiconductor
Reset
Read
Write
CLK_MODE
OSC_DIV2
Bit
ROPD
ROSB
COHL
Field
15
14
13
12
11
15
0
ROS
14
B
0
Relaxation Oscillator Power Down
This bit is used to power down the relaxation oscillator. The user may power down the relaxation oscillator
if the external reference is being used. In order to prevent loss of clock to the core or the PLL, this bit
should only be asserted if the clock source has been changed to the external source by setting the
PRECS bit in CTRL.
0
1
Relaxation Oscillator Standby
This bit is used to control the power usage and gross frequency of the relaxation oscillator. It is reset to
the more accurate but higher power state.
0
1
Crystal Oscillator High/Low Power Level
This bit is used to control the power usage of the crystal oscillator. It is reset to the high power state,
which allows either a crystal or resonator to be used.
0
1
Crystal Oscillator Clock Mode
This bit turns off the Crystal Oscillator for power savings.
NOTE: If the crystal oscillator is turned off and then turned on again, the clock should not be switched
0
1
Oscillator Divide By 2
This bit is used to select to the frequency range of the crystal oscillator
PRECS should be 0, ROSC selected, before changing the value of OSC_DIV2 to avoid glitches on the
system clock.
0
1
Relaxation Oscillator Enabled
Relaxation Oscillator Powered Down
Normal mode. The relaxation oscillator output frequency is 8MHz.
Standby mode. The relaxation oscillator output frequency is reduced to 400KHz(+/-50%). The PLL
should be disabled in this mode and MSTR_OSC should be selected as the output clock.
High power mode. This mode is required as default.
Low power mode. This is the desired mode when a less than 8 MHz low power crystal is used .
Crystal oscillator enabled.
Crystal oscillator disabled.
External Oscillator output is not divided.
External Oscillator output is divided by 2 befor use as MSTR_OSC.
13
0
back to the oscillator until after the crystal has had time to stabilize. See the crystal data sheet to
determine this time duration.
CLK_
MOD
12
E
1
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
OSC_
DIV2
11
OCCS_OSCTL field descriptions
0
Table continues on the next page...
EXT_
SEL
10
1
1
9
Preliminary
0
8
Description
0
7
0
6
Chapter 15 On-Chip Clock Synthesis (OCCS)
0
5
TRIM
0
4
0
3
0
2
0
1
0
0
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