The PIC16C63A/65B/73B/74B parts you have received conform functionally to the Device Data Sheet (DS30605 C), except for the anomalies described below. PIC16C63A/65B/73B/74B PIC16C63A/65B/73B/74B Rev. A Silicon/Data Sheet Errata The PIC16C63A/65B/73B/74B parts you have received 2. Module: TMR1 conform functionally to the Device Data Sheet (DS30605C), except for the anomalies described When operating in External Clock mode (TMR1CS below. is set), reading either of the Timer1 registers (TMR1H or TMR1L) may cause the timer not to increment as expected. This occurs ……