4-3. Application Notes
2/99 4-11 U3-1021
Westinghouse Proprietary Class 2C
Board Option Register
(Read only)
(Cont’d)
0A00H 8 bits Bit 5 = 0 (No function)
Bit 6 = 0 (No function)
Bit 7 = 0 (No function)
Board Control Register
(Write only)
0A80H 8 bits Bit 0 = (CPU_INT-ERR)
0 = Internal error has not been detected
by application program.
1 = Internal error has been detected
by application program.
Bit 1 = (CPU_EXT-ERR)
0 = External error has not been detected
by application program.
1 = External error has been detected
by application program.
Bit 2 = Not used
Bit 3 = Not used
Note
Bit 4 (PWRUPRDY/) is cleared upon
module power-up and should remain
in that state during normal module
operation.
Bit 4= (PWRUPRDY/)
0 = Provide the 80C186 processor
with a READY signal every bus cycle.
1 = Do not provide the 80C186 processor
with a READY signal every bus cycle.
Bit 5 = Not used
Bit 6 = Not used
Bit 7 = (VPP-CTL)
0 = Turn off flash memory VPP
programming voltage
1 = Turn on flash memory VPP
programming voltage
Table 4-1. User-Accessible I/O (Cont’d)
Description I/O Address Width Bit Definitions
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