msp430x21x2_hfxtal_nmi.c

来自「MSP430的开发程序的例子+中文注释」· C语言 代码 · 共 15 行

//******************************************************************************
//   MSP430F21x2 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 *//
//
//                MSP430F21x2
//             -----------------
//         /|\|              XIN|-
//          | |                 | HF XTAL (3