Part Number:MSP430G2955
Hello Everyone,
I am bit confused of the usability of SMCLK and SPI configuration and have some other question related to frequency sitting, so what i understand is that the SMLCK is sourcing the peripherals like SPI in my case, and from the module+ registers i can configure the frequency according to my wishes and also i can use this SMCLK to feed pin which is connected to it,am i wrong?
for the other question, i wante to configure the registers accessing directly the bits,i looked at one example from MS430ware and they are using directly certain predifined value as below
DCOCTL = 0; // Select lowest DCOx and MODx settings
BCSCTL1 = CALBC1_8MHZ; // Set DCO to 8MHz
DCOCTL = CALDCO_8MHZ;
P2DIR |= 0x07; // P2.0,1,2 output direction
P2SEL |= 0x03; // P2.0 = ACLK, P2.1 = SMCLK
so i opened declaration of the CALBC1_8MHZ but didn t find anything detailed about it
an i thought if i configure the RSELx ,DCOx and MODx would be the same but this is what it says on the datasheet.
fDCO(13,3) DCO frequency (13, 3) RSELx = 13, DCOx = 3, MODx = 0 3 V 6.00 7.8 9.60 MHz
and
BCSCTL1 = CALBC1_8MHZ,
DCOCTL = CALDCO_8MHZ, 0°C to 85°C 3 V -3 ±0.5 3 %
as you see i am bit lost here, thank you in advance for any help to clarify it