
501
19.3 Registers of the Wild Register Function
Table 19.3-4 Functions of the Address Comparison Enable Register (WREN)
Bit name
Function
Bit 7
Bit 6
Unused bits
The read value is undefined.
For a write, always write 0.
Bit 5
EN05:
Setting this bit to 0 disables the wild register function.
Setting this bit to 1 enables the wild register function. If a
match is then found for the address set in WRARH5 and
WRARL5, the value in the WRDR5 is output to the
internal bus instead of the value in ROM.
Bit 4
EN04:
Setting this bit to 0 disables the wild register function.
Setting this bit to 1 enables the wild register function. If a
match is then found for the address set in WRARH4 and
WRARL4, the value in the WRDR4 is output to the
internal bus instead of the value in ROM.
Bit 3
EN03:
Setting this bit to 0 disables the wild register function.
Setting this bit to 1 enables the wild register function. If a
match is then found for the address set in WRARH3 and
WRARL3, the value in WRDR3 is output to the internal
bus instead of the value in ROM.
Bit 2
EN02:
Setting this bit to 0 disables the wild register function.
Setting this bit to 1 enables the wild register function. If a
match is then found for the address set in WRARH2 and
WRARL2, the value in the WRDR2 is output to the
internal bus instead of the value in ROM.
Bit 1
EN01:
Setting this bit to 0 disables the wild register function.
Setting this bit to 1 enables the wild register function. If a
match is then found for the address set in WRARH1 and
WRARL1, the value in the WRDR1 is output to the
internal bus instead of the value in ROM.
Bit 0
EN00:
Setting this bit to 0 disables the wild register function.
Setting this bit to 1 enables the wild register function. If a
match is then found for the address set in WRARH0 and
WRARL0, the value in the WRDR0 is output to the
internal bus instead of the value in ROM.