Hi Andreas, I did as you suggested and the SPI works correctly at much higher speeds. Thank for your help. This still leaves me with the problem of a chip select signal generated by GPIO that is extremely slow and if I follow a set too closely behind a clear, I never see the low state on the signal line. Am I also doing something wrong with the GPIO. When I step through the code for manipulating the GPIO signal, it works as I expect. Thanks, Bob Davis --- In lpc2000@yahoogroups.com, "haack0815" <lpc_arm@s...> wrote: > Hi Bob, > > the maximum SCLK of the SPI Interface is 1/8 of pclk. > > If cclk is 60MHz and pclk = cclk you get a maximum SCLK speed of 7.5 MHz. > > > It seems that your cclk is 14.7 Mhz and pclk is 1/4 of cclk. > Setup your PLL and VPBDIV Register to the right values. > > Andreas
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Re: Strange SPI behavior and slow gpio
2004-06-09 by rkdwork
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