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Control Registers
509
SPNU563A–March 2018
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CPU Compare Module for Cortex-R5F (CCM-R5F)
13.3.2 CCM-R5F Key Register 1 (CCMKEYR1)
Figure 13-4. CCM-R5F Key Register 1 (CCMKEYR1) (Offset = 04h)
31 16
Reserved
R-0
15 4 3 0
Reserved MKEY1
R-0 R/WP-0
LEGEND: R/W = Read/Write; R = Read only; WP = Write in privileged mode only; -n = value after reset
Table 13-9. CCM-R5F Key Register 1 (CCMKEYR1) Field Descriptions
Bit Field Value Description
31-4 Reserved 0 Reads return 0. Writes have no effect.
3-0 MKEY1 Mode Key to select operation for CPU Output Compare Diagnostic .
Read in User and Privileged mode. Write in Privileged mode only.
0 Read: Returns current value of the MKEY1.
Write: Active Compare Lockstep mode.
6h Read: Returns current value of the MKEY1.
Write: Self-test mode.
9h Read: Returns current value of the MKEY1.
Write: Error Forcing mode.
Fh Read: Returns current value of the MKEY1.
Write: Self-test Error Forcing mode.
Other values Note: It is recommended to not write any other key combinations. Invalid keys will result in
switching operation to lockstep mode.
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