MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 530

• 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

Functional Description
530
External Clock Source
External Clock Source
Clock Source
Crystal
Table 15-10. Clock Choices with Crystal Oscillator (continued)
Clock Selected Configuration Steps
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
Postscaler
Postscaler
Direct
10. Change ZSRC to select the postscaler clock (ZSRC=10).
10. Change ZSRC to select the postscaler clock (ZSRC=10).
11. At this point the EXTAL pin can be used as a GPIO by deasserting
1. The crystal oscillator should be powered up (CLK_MODE=0).
2. Change the oscillator to low power mode (COHL=1)
3. Wait for the crystal oscillator to stabilize (up to 10ms)
4. The clock source should be changed to the crystal oscillator
5. Wait 6 NOP's for the synchronizing circuit to change clocks.
6. The relaxation oscillator can be powered down (ROPD=1) to con‐
7. Change COD, if desired
8. Enable the PLL (PLLPD=0)
9. Wait for PLL lock (LCK1=1 and LCK0=1)
1. The clock source (CLKIN) should be enabled in the GPIO and SIM
2. Set the CLK_MODE bit in OSCTL register to 1.
3. Select CLKIN as the source clock (PRECS=1).
4. The clock source should be changed to the crystal oscillator
5. Wait 6 NOP's for the synchronizing circuit to change clocks.
6. The relaxation oscillator can be powered down (ROPD=1) to con‐
7. At this point the EXTAL pin can be used as a GPIO by deasserting
1. The clock source (CLKIN) should be enabled in the GPIO and SIM
2. Set the CLK_MODE bit in OSCTL register to 1.
3. Select CLKIN as the source clock (PRECS=1).
4. The clock source should be changed to the crystal oscillator
5. Wait x NOP's for the synchronizing circuit to change clocks.
6. The relaxation oscillator can be powered down (ROPD=1) to con‐
7. Change COD, if desired
8. Enable the PLL (PLLPD=0)
9. Wait for PLL lock (LCK1=1 and LCK0=1)
Preliminary
(EXT_SEL=0, PRECS=1, in that order)
serve power
as necessary.(Chip dependent)
(EXT_SEL=1, PRECS=1, in that order).
serve power.
the appropriate PE bit in the GPIO_X_PER.
as necessary.(Chip dependent)
(EXT_SEL=1, PRECS=1, in that order)
serve power
the appropriate PE bit in the GPIO_X_PER.
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