TRCPIDR4 Trace Peripheral Identification Register 4 when FEAT_ETE is implemented and FEAT_TRC_EXT is implemented ETE 0xFD0 TRCPIDR4 When !IsTraceCorePowered() ERROR RO Provides discovery information about the component. For additional information, see the CoreSight Architecture Specification. Trace Management TRCPIDR4 is a 32-bit register. 31 8 31:8 Reserved, RES0. SIZE 7 4 7:4 Size of the component. Using this field to indicate the size of the component is deprecated. This field might not correctly indicate the size of the component. Arm recommends that software determine the size of the component from the Unique Component Identifier fields, and other IMPLEMENTATION DEFINED registers in the component. This field has the value 0b0000. 0b0000 One of the following is true: The component uses a single 4KB block. The component uses an IMPLEMENTATION DEFINED number of 4KB blocks. 0b0001..0b1111 The component occupies 2^{TRCPIDR4.SIZE} 4KB blocks. RO DES_2 3 0 3:0 Designer, JEP106 continuation code. The JEP106 identification and continuation codes are stored as follows: TRCPIDR1.DES_0: JEP106 identification code bits[3:0]. TRCPIDR2.DES_1: JEP106 identification code bits[6:4]. TRCPIDR4.DES_2: JEP106 continuation code. These codes indicate the designer of the component and not the implementer, except where the two are the same. To obtain a number, or to see the assignment of these codes, contact JEDEC http://www.jedec.org. A JEP106 identification and continuation code takes the following form: A sequence of zero or more numbers, all having the value 0x7F. A following 8-bit number, that is not 0x7F, and where bit[7] is an odd parity bit. The parity bit in the JEP106 identification code is not included. For example, Arm Limited is assigned the code 0x7F 0x7F 0x7F 0x7F 0x3B. The continuation code is the number of times 0x7F appears before the final number. For example, a component designed by Arm Limited has the code 0x4. The identification code is bits[6:0] of the final number. For example, a component designed by Arm Limited has the code 0x3B. This field has an IMPLEMENTATION DEFINED value. RO External debugger accesses to this register are unaffected by the OS Lock. 2026-03-26 20:27:25 2026-03_rel