msp430x24x_hfxt2_nmi.s43

来自「步进电机驱动程序msp430f247单片机」· S43 代码 · 共 15 行

;*******************************************************************************
;   MSP430x24x Demo - Basic Clock, LFXT1/MCLK Sourced from HF XTAL, NMI
;
;   Description: Proper selection of an external HF XTAL for MCLK is shown with
;   enabled OSC fault interrupt - if HF XTAL fails, NMI interrupt is requested.
;   HF XTAL can only source MCLK when OSC fault is clear. For demonstration
;   purposes P1.0 is set during OSC fault. MCLK/10 is on P1.1.
;   ACLK = MCLK = LFXT1 = HFXTAL
;   //* HF XTAL NOT INSTALLED ON FET *//
;   //* Min Vcc required varies with MCLK frequency - refer to datasheet *//
;
;                MSP430F249
;             -----------------
;         /|\|              XIN|-
;          | |                 | HF XTAL (3