RM0082
AS_Cryptographic co-processor (C3)
Doc ID 018672 Rev 1
365/844
the ones in the Instruction Dispatcher Status and Control Register (ID_SCR) of each ID.
These bits allow knowing the status of all Instruction Dispatcher with a single AHB slave
read. See the Instruction Dispatcher document section for more details
Bit 23 to 20 - Instruction dispatcher n interrupt status (ISDn)
Interrupt States (IS) of every Instruction Dispatcher are made available in these bits. These
bits are the same than the ones in the Instruction Dispatcher Status and Control Register
(ID_SCR) of each ID. Interrupts can be acknowledged using the Status and Control Register
of the Instruction Dispatcher (ID_SCR) or using these bits. See the Instruction Dispatcher
document section for more details.
Bit 19 - Interrupt status of all instruction dispatchers (ISA)
The Interrupt Status of All Instruction Dispatchers (ISA) is the logical OR of bits ISD3-ISDO.
This bit represents the state of the Interrupt pin of the C3 document. Writing one to this flag
has the same effect as writing one in all ISD3-ISDO.
Bit 18 - Clear interrupt status on read (CISR)
If the Clear Interrupt Status on Read bit (CISR) is set, clearing of Interrupt States is
performed by reading the Status and Control Register of the System (SYS_SCR). The
Status and Control Register of Instruction Dispatchers (ID_SCR) is not affected by this bit.
Bit 17 - Big endian (BEND)
Not implemented. This bit should be set to zero.
Bit 23-20 ISDn
Description
1’b1
The Instruction Dispatcher n is requesting an Interrupt.
1’b0
(Clearing conditions) The Interrupt Status (IS) of Instruction
Dispatcher n can be cleared writing one to this flag. Writing zero
has no effect.
Bit 19 ISA
Description
1’b1
At least one Instruction Dispatcher is requesting an Interrupt.
1’b0
(Clearing conditions) The Interrupt Status (IS) of Instruction
Dispatcher can be cleared writing one to this flag. Writing zero
has no effect.
Bit 18 CISR
Description
1’b1
Reading SYS_SCR dears Interrupt States of all Instruction
Dispatchers.
1’b0
Do not clear Interrupt States on SYS_SCR read.