MC68EC000EI16 Freescale Semiconductor, MC68EC000EI16 Datasheet - Page 7

• Manufacturer Part Number: MC68EC000EI16
• Description: IC MPU 32BIT 16MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC000EI16

• Processor Type: M680x0 32-Bit
• Speed: 16MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

7
After the previous steps are completed, the MC68SEC000 will remain in the low-power mode until it
recognizes the appropriate interrupt . External logic will also have to poll IPLB2–IPLB0 to detect the proper
interrupt. When the correct interrupt level is received, the following steps will bring the processor out of the
low-power mode:
1. Restart the system clock if it was stopped.
2. Wait for the system clock to become stable.
3. Assert the RESTART signal. This will cause the processor’s clock to start on the next falling edge of
4. If the MC68SEC000 was placed in a three-state condition, the BR signal must be negated before the
the system clock. Figure 6 shows the timing for bringing the processor out of the low-power mode.
Both the RESTART and RESET signals are subject to the asynchronous setup time as specified in
the Electrical Characteristics section of this addendum.
processor can begin executing instructions.
CPU_CLK
RESTART
CLK
The system clock must be stable before the RESTART signal is asserted
to prevent glitches in the clock. An unstable clock can cause unpredictable
results in the MC68SEC000.
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 6. MC68SEC000 Clock Start Timing
M68000 USER’S MANUAL ADDENDUM
Go to: www.freescale.com
WARNING
MOTOROLA