how to use or program the timer without use of PLL.And also i want to know bec my onboard or external crystal is 11.085Mhz so what will be the frequncy on which the LPC2148 will work or its defalut frequncy.please mail me on aminpragnesh3@yahoo.co.in
You don’t need the PLL to use the timers of the LPC2148. Without the use of the PLL, the processor clock (CCLK) is equal to the crystal frequency.
As far as I remember, the timer runs off the PCLK (peripheral clock), which can be configured to be 1/1, 1/2 or 1/4 of the CCLK (processor clock).