AS_Cryptographic co-processor (C3)
RM0082
380/844
Doc ID 018672 Rev 1
Bit 22 - Interrupt Enable on Stop (IES)
Bit 21 - Interrupt Enable on Error (IER)
Bit 20 - Single Step Command (SSC)
If the Instruction Dispatcher is put in Single Step Mode using bit SSE of ID_SCR it will await
for SSC to be set before executing/dispatching the next instruction. In this context, a Single
Step is defined as the execution/dispatching of the instruction and its argument. The first
instruction is not executed/dispatched launching a new program when SSE is set.
Bit 19 - Single Step Enable (SSE)
Bit 18 - Reserved
This bit is reserved and should be set to zero.
Bit 22 IES
Description
1’b1
The Instruction Dispatcher generates an Interrupt on normal
termination of a program execution (when the stop instruction
executes).
1’b0
Do not generate Interrupt. Cleaning this bit does not clear
pending interrupts.
Bit 21 IER
Description
1’b1
The Instruction Dispatcher generates an Interrupt when a
program encounters an error. The error cause can be analyzed
through bits 29-24 of ID_SCR.
1’b0
Do not generate Interrupt. Cleaning this bit does not clear
pending Interrupts.
Bit 20 SSC
Description
1’b1
Writing one to this flag in Single Step Mode (SSE is set)
executes / dispatches the next instruction.
1’b0
(Cleaning Conditions) This bit is cleared when the execution of
the current single instruction terminates. Writing zero has no
effect.
Bit 19 SSE
Description
1’b1
Enable Single Step Mode. This bit can be changed anytime.
1’b0
Disable Single Step Mode. Exiting Single Step Mode clears also
SSC.