UM0434 Datasheet, PDF (289/390 Pages) STMicroelectronics – The primary objective of this user’s manual is to describe

External core complex interfaces
UM0434
Figure 61 shows the relationship between p_ipend and the interrupt request inputs. Note
that p_ipend is asserted combinationally from the p_extint_b and p_critint_b inputs.
Figure 61. Interrupt pending operation
m_clk
p_extint_b
p_critint_b
Exception vector fetch
p_ipend
Figure 62 shows the relationships among p_iack, the interrupt request inputs, and exception
vector fetching.
Figure 62. Interrupt acknowledge operation case 1
m_clk
p_critint_b
p_extint_b
p_voffset[0:15]
sample point
p_iack
p_avec_b
p_treq_b
p_addr
attributes
p_r/w
p_tbusy_b
p_data_in
p_ta_b
mmu access
cache access
cache miss
1
2
vec A
idle
3
4
5
vec B
A handler
A +8
A +16
1 outst.
2 outst.
1st inst pair
pair
int A handlr A hand + 8
int A hand addr int A hand + 8
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