User manual

MPLAB
®
PM3 User’s Guide
DS51464C-page 106 © 2006 Microchip Technology Inc.
A.5.4.2 INSERTIONS
The expected life for manual insertions has been found to be less than the manufac-
turer’s reported number. The number of manual insertions depends on the socket
condition and how often the socket is cleaned.
Careless insertions or dirty socket conditions can bring the number of insertions down
to less than 5,000. Cleanliness and care in inserting devices into a socket are most
important with surface mount devices because the socket contacts must remain
planar to function properly.
Any bent or nonplanar contacts will result in a failure. Nonplanar socket module
contacts occur earlier in the life of a socket module when devices are inserted manually
into a socket module. Early contact failure from manual insertions is due to the non
repeatability of the manual insertion method. Therefore, the listed number of insertions
might not be reached for sockets if devices are inserted manually. No good method
exists to ensure that the contacts are planar.
A.5.4.3 CLEANING METHOD – METHYL ALCOHOL
Clean with methyl alcohol, then blow off the contacts with dry compressed air.
A.5.5 Typical Programming Times
Table A-12 shows typical programming times for MPLAB PM3 when used in
Stand-Alone mode. Results may vary when programming through MPLAB IDE.
DANGER
Methyl alcohol is highly flammable. Use methyl alcohol in a well ventilated area
away from sparks, flames or any other source of ignition. Methyl alcohol is
poisonous and may cause blindness if taken internally. Avoid inhaling methyl
alcohol vapor.
TABLE A-12: TYPICAL PROGRAMMING TIMES IN STAND-ALONE MODE
Device Programming Time
PIC12F675 4 seconds
PIC16F877A 5 seconds
PIC16F819 4 seconds
PIC18F452 7 seconds
PIC16F88 3.7 seconds
PIC16C55A 2.5 seconds
PIC17C44 10 seconds
PIC12C509 4 seconds
PIC16F77 6.6 seconds
PIC16F877 37 seconds
PIC18F8720 24 seconds