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bf609 sys_fault and sys_fault_n

Question asked by jiangfux on Aug 27, 2013
Latest reply on Aug 27, 2013 by jiangfux

Hi, everyone.

Does pin sys_fault on bf609 must pull_down?

If i leave it unconnected, what will happen?

I design a pcb, and sys_fault is not connected. uClinux whill hang after enable SEC.

 

In function init_arch_irq

     bfin_write_SEC_FCTL(SEC_FCTL_EN | SEC_FCTL_SYSRST_EN | SEC_FCTL_FLTIN_EN);

     bfin_sec_enable_sci(BFIN_SYSIRQ(IRQ_WATCH0));

     bfin_sec_enable_ssi(BFIN_SYSIRQ(IRQ_WATCH0));

    bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_RESET);

    udelay(100);

    bfin_write_SEC_GCTL(SEC_GCTL_EN);   /* after this line, bf609 looks like be reset */

    bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN);

    bfin_write_SEC_SCI(1, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN);

 

i use gdbproxy,  read RCU_STAT is 0x24. it looks like System source reset occurred.

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