Analog Devices ADSP-SC58 Series Hardware Reference Manual page 630

ADSP-SC58x PORT Register Descriptions
Table 14-21: PORT_LOCK Register Fields (Continued)
Bit No.
(Access)
3 DIR
(R/W)
2 DATA
(R/W)
1 MUX
(R/W)
0 FER
(R/W)
14–58
Bit Name
Direction Lock.
The PORT_LOCK.DIR disables write access to the PORT_DIR, PORT_DIR_SET,
PORT_DIR_CLR
Data, TGL Lock.
The PORT_LOCK.DATA disables write access to the PORT_DATA,
PORT_DATA_SET, PORT_DATA_CLR, and
Function Multiplexer Lock.
The PORT_LOCK.MUX disables write accesses to the
Function Enable Lock.
The PORT_LOCK.FER disables write access to the PORT_FER, PORT_FER_SET,
and PORT_FER_CLR
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
Description/Enumeration
registers.
0 Unlock DIR
1 Lock DIR
PORT_DATA_TGL
0 Unlock DATA
1 Lock DATA
0 Unlock MUX
1 Lock MUX
registers.
0 Unlock FER
1 Lock FER
registers.
PORT_MUX register.