Information

PIC18F1220/1320
DS80175E-page 2 © 2005 Microchip Technology Inc.
4. Module: EUSART
The auto-baud measurement may not determine the
correct baud rate if the resulting measurement could
overflow the SPBRG register when measuring slow
baud rates. In such cases, SPBRGH:SPBRG will
contain 0x00FF.
Work around
Either or both of the following work arounds may
be used:
1. Use a faster baud rate that can not result in
auto-baud measurements greater that 0x00FF.
2. Clear the BRGH bit (TXSTA<2>). This divides
the bit clock by 64 rather than dividing it by 16.
Date Codes that pertain to this issue:
All engineering and production devices.
5. Module: Reset
It has been observed that in certain Reset condi-
tions, including power-up, the first GOTO instruction
at address 0x0000 may not be executed. This
occurrence is rare and affects very few applications.
To determine if your system is affected, test a
statistically significant number of applications across
the operating temperature, voltage and frequency
ranges of the application. Affected systems will
repeatably fail normal testing. Systems not affected
will continue to not be affected over time.
Work around
Insert a NOP instruction at address 0x0000.
Date Codes that pertain to this issue:
All engineering and production devices.