CTIDEVARCH, CTI Device Architecture register
The CTIDEVARCH characteristics are:
Identifies the programmers' model architecture of the CTI component.
CTIDEVARCH is in the Debug power domain.
If the CTI is CTIv1, this register is OPTIONAL. If the CTI is CTIv2, this register is mandatory.
Arm recommends that the CTI is CTIv2.
In an Armv8.5 compliant implementation, the CTI must be CTIv2.
CTIDEVARCH is a 32-bit register.
The CTIDEVARCH bit assignments are:
ARCHITECT, bits [31:21]
Defines the architecture of the component. For CTI, this is Arm Limited.
Bits [31:28] are the JEP106 continuation code, 0x4.
Bits [27:21] are the JEP106 ID code, 0x3B.
PRESENT, bit 
When set to 1, indicates that the DEVARCH is present.
This field is 1 in Armv8.
REVISION, bits [19:16]
Defines the architecture revision of the component.
As 0b0000, and also adds support for CTIDEVCTL.
|When FEAT_DoPD is implemented|
All other values are reserved.
ARCHID, bits [15:0]
Defines this part to be an Armv8 debug component. For architectures defined by Arm this is further subdivided.
- Bits [15:12] are the architecture version, 0x1.
- Bits [11:0] are the architecture part number, 0xA14.
This corresponds to CTI architecture version CTIv2.
Accessing the CTIDEVARCH
CTIDEVARCH can be accessed through the external debug interface:
Accesses on this interface are RO.