Zilog Z80230 - Manual (Page 42)

SCC/ESCC
User Manual
UM010903-0515 Interfacing the SCC/ESCC
35
Interface Programming
The following subsections explain and illustrate all areas of interface programming.
Z85X30 Register Reset Value
Hardware RESET Channel RESET
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
WR0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
WR1 0 0 X 0 0 X 0 0 0 0 X 0 0 X 0 0
WR2 X X X X X X X X X X X X X X X X
WR3 X X X X X X X 0 X X X X X X X 0
WR4 X X X X X 1 X X X X X X X 1 X X
WR5 0 X X 0 0 0 0 X 0 X X 0 0 0 0 X
WR6 X X X X X X X X X X X X X X X X
WR7 X X X X X X X X X X X X X X X X
WR7'* 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0
WR9 1 1 0 0 0 0 X X X X 0 X X X X X
WR10 0 0 0 0 0 0 0 0 0 X X 0 0 0 0 0
WR11 0 0 0 0 1 0 0 0 X X X X X X X X
WR12 X X X X X X X X X X X X X X X X
WR13 X X X X X X X X X X X X X X X X
WR14 X X 1 1 0 0 0 0 X X 1 0 0 0 X X
WR15 1 1 1 1 1 0 0 0 1 1 1 1 1 0 0 0
RR0 X 1 X X X 1 0 0 X 1 X X X 1 0 0
RR1 0 0 0 0 0 1 1 X 0 0 0 0 0 1 1 X
RR3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RR10 0 X 0 0 0 0 0 0 0 X 0 0 0 0 0 0
Note: *WR7' is only available on the 85C30 and the ESCC.