PMF18WD1 Microchip Technology, PMF18WD1 Datasheet - Page 23
![PROCESSOR MODULE FOR ICE4000](/photos/26/90/269011/processormodule-ice4000_general_sml.jpg)
PMF18WD1
Manufacturer Part Number
PMF18WD1
Description
PROCESSOR MODULE FOR ICE4000
Manufacturer
Microchip Technology
Datasheet
1.ICE4000.pdf
(98 pages)
Specifications of PMF18WD1
Module/board Type
Processor Module
Product
Microcontroller Modules
Core Processor
PIC18F1310 and PIC18F1320
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
ICE4000
For Use With
ICE4000 - EMULATOR MPLAB-ICE 4000 POD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
3.6
2004 Microchip Technology Inc.
SETTING UP THE PROCESSOR CLOCK
3.5.3
MPLAB ICE 4000 also supports LOW VOLTAGE emulation down to 2.5V. The emulator
system cannot provide any voltage level other than 5V to the emulator processor. In
this configuration, power must be supplied by the target board (see Section 3.5.2
“Processor Power from Target Board”).
Before using low voltage, check the limitations for your selected device. Some devices
allow emulator pins to come up as output high, instead of input. Make certain you do
not allow the emulated device to do this if your application cannot tolerate 5V.
MPLAB ICE 4000 can use the on-board clock with either emulator or target power, or
it can use the target board clock with target board power.
3.6.1
MPLAB ICE 4000 has an on-board clock that can be programmed to a frequency
between 32 kHz and 100 MHz. Refer to the specific device's data sheet to determine
the supported frequency range.
1. Select an Oscillator Type (Section 3.3.3 “Oscillator Settings”).
2. Select the Clock tab on the Debugger>Settings dialog.
3. Select the Desired Frequency magnitude (MHz, kHz or Hz) and enter the
4. Click Apply.
The clock will be programmed to operate as close to the entered frequency as possible.
Since the generated clock frequency will be slightly different than the desired clock
frequency, the Actual Frequency will be displayed. The Actual Frequency will be within
0.5% of the desired frequency.
3.6.1.1
If the Oscillator mode has a HW PLL associated with it, the run time frequency will be
the desired frequency. Example: To emulate a target with a 5 MHz HS crystal while
using HW PLL mode, set the desired frequency to 20 MHz.
For parts (e.g., PIC18F8680) that support SW enabled PLL, please do not enter a
frequency that, when multiplied by 4, would go over the maximum speed the emulator
supports.
Consult the device limitations to see how PLL is emulated for your selected device.
3.6.1.2
To verify the clock frequency, you can set up a complex trigger and then measure the
trigger output pulse width (one instruction cycle) of the TRIGOUT logic probe
(Section B.7 “Logic Probes”) in frequency and multiply by 4.
Desired Frequency. Refer to the specific device’s data sheet to determine the
supported frequency range for each oscillator type.
Note: If you enter a frequency that is out of range, your system will not
Low Voltage Emulation
Using the On-board Clock
PLL
VERIFY FREQUENCY
operate properly.
General Set Up
DS51490A-page 17