Post by thread:PIC64/65 and TMR1 question

Hi all, I try to use TMR1 section and read PIC16C6X documentation from Microchip. There is some item which are not very clear: ** about TMR1 external oscillator: - does the oscillator run if T1OSCEN=1 only ? I mean even if TMR1CS=0 OR TMR1ON=0 ? - what is exactly the condition which allows the TMR1 oscillator to run ? ** about TMR1 external oscillator output: - documentation is not very clear about Input and Output for external oscillator / TMR1 counter input - in PDF doc file (30234B.PDF) 16C6X, page 51 and 52 there is the following pin assignation for timer 1: for 16C64A, R64, 65, 65A: RC.0 T1CKIn or T1OSCout RC.1 T1OSCIn for 16C64: RC.0 T1CKIn or T1OSCIn RC.1 T1OSCOut I have some difficulty to believe the PIN RC.0 and RC.1 are inverted between the 16C64 version and the over version. It is a mistake ? - About TMR1 oscillator output: If the external oscillator bit is set (T1OSCEn), does the pin T1OSCOut output a square wave if RC.0(RC.1) port is set as output. Who have the priority on portC, the TMR1 oscillator or the TRISC register ? If RC.0 is set as input, can we read the pin state, i.e. the square wave from a read port instruction ? - About TMR1 Counter mode: If RC.0 is set as output, by setting and clearing this bit from a program, we can normally incremented TMR1 counter, I'm right ? The main problem is the documentation never said clearly when the PORT C pin are dedictated to TIMER and when PORT C pin are dedicated to TRIS C register. The schematic figure 5-6 at page 52 will not help the user, nothing is said about "peripheral select" !!!!! Thanks to help me Philippe. (spam_OUTP.TECHERTakeThisOuTinsat.com)

Please help me to solve TMR1 question, I try to use TMR1 section and read PIC16C6X documentation from Microchip. There is some item which are not very clear: ** about TMR1 external oscillator: - does the oscillator run if T1OSCEN=1 only ? I mean even if TMR1CS=0 OR TMR1ON=0 ? - what is exactly the condition which allows the TMR1 oscillator to run ? ** about TMR1 external oscillator output: - documentation is not very clear about Input and Output for external oscillator / TMR1 counter input - in PDF doc file (30234B.PDF) 16C6X, page 51 and 52 there is the following pin assignation for timer 1: for 16C64A, R64, 65, 65A: RC.0 T1CKIn or T1OSCout RC.1 T1OSCIn for 16C64: RC.0 T1CKIn or T1OSCIn RC.1 T1OSCOut I have some difficulty to believe the PIN RC.0 and RC.1 are inverted between the 16C64 version and the over version. It is a mistake ? - About TMR1 oscillator output: If the external oscillator bit is set (T1OSCEn), does the pin T1OSCOut output a square wave if RC.0(RC.1) port is set as output. Who have the priority on portC, the TMR1 oscillator or the TRISC register ? If RC.0 is set as input, can we read the pin state, i.e. the square wave from a read port instruction ? - About TMR1 Counter mode: If RC.0 is set as output, by setting and clearing this bit from a program, we can normally incremented TMR1 counter, I'm right ? The main problem is the documentation never said clearly when the PORT C pin are dedictated to TIMER and when PORT C pin are dedicated to TRIS C register. The schematic figure 5-6 at page 52 will not help the user, nothing is said about "peripheral select" !!!!! Thanks to help me Philippe. (.....P.TECHERKILLspam@spam@insat.com)