Help me in MSSP module in PIC16F877A

[omar_abdalla]

I am using MSSP in PIC16F877A to communicate with a device
And I use the MASTER mode
BUT i want to get a clock of 5Khz

can i get this clock with 2Mhz crystal????

can i get it using timer2 module???

 

[neoaspilet11]

Help in MSSP module

5kHz clock for SPI transmission is too slow although possible.

PIC MSSP module gets it clocking from MSSP sontrol register SSPCON1 bits <3-0> settings. It has choices if you clock at FOSC/4, FOSC/16, FOSC/64 or TMR/2; but I suggest you use the FOSC clocking so that communication will allign to instruction cycles.

So if your system clock is 2MHz, your FOSC = 2MHz.

I suggest also you use maximum clocking at 5MIPS or 20 Mhz clock.