The PIC16F87X (Rev. B3) parts you have received conform functionally to the Device Data Sheet (DS30292A), except for the anomalies described below. All the problems listed here will be addressed in future revisions of the PIC16F87X silicon. This errata applies to all PIC16F877-20/P production devices marked with an assembly date code prior to 9925. 4. PIC16F87X PIC16F87X Rev. B3 Silicon Errata Sheet The PIC16F87X (Rev. B3) parts you have received 4. Module: TMR1 conform functionally to the Device Data Sheet When operating in external clock mode (TMR1CS (DS30292A), except for the anomalies described is set), reading either of the timer 1 registers below. (TMR1H or TMR1L) may cause the timer not to All the problems listed here will be addressed in future increment as expected. This occurs for both syn- revisions of the PIC16F87X silicon. chronous and ……