SREG port
[IO File]

SREG port connectivity

Requests to this port

• pavr_s5_alu_sregwr_rq
  This signalizes that an instruction that uses the ALU wants to update the arithmetic flags.
  Flags I (general interrupt enable, SREG(7)) and T (transfer bit, SREG(6)) are left unchanged.
  
• pavr_s5_setiflag_sregwr_rq
  This sets the I flag.
  Only RETI instruction needs this.
• pavr_s5_clriflag_sregwr_rq
  This clears the I flag.
  No instruction explicitely requests this.
  This is only requested when an interrupt is acknowledged (during the consequent implicit CALL).
  
  

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