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DM3730: IRQ enabled with TI's INTC register or ARM CPSR register ?

Guru 20755 points
Part Number: DM3730

Hello,

It seem that enabling irq interrupt can be done in the following two ways:

1. Enabling irq bit in INTCPS_CONTROL register (page 2429 in TRM, register 0x48 in INT section)

2. Enabling irq bit in CPSR_c ARM register.

Are this the same operations ? I mean is doing  (1) equals (2) ?

if not - When do we enable interrupt by (1) and when by (2) ? or do we need to do both ?

 

Thank you,

Ran