Z90251 Datasheet, PDF (72/97 Pages) Zilog, Inc. – eZVision 200 Television Controllers with OSD

Z90255 ROM and Z90251 OTP
32 KB Television Controller with OSD
64
Bit/
Field
Reserved
P63
P62
P61
P60
Bit
Position
7, 6, 5, 4
3
2
1
0
R/W
Value Description
R
Return Unknown
W
No Effect
R
Data input on P63
W
Data Output on P63
R
Data input on P62
W
Data Output on P62
R
Data input on P61
W
Data Output on P61
R
Data input on P60
W
Data Output on P60
Table 49 Port 6 Direction Control Register 02h: Bank F (PRT6_DRT)
Bit
7
6
5
R/W
R/W R/W R/W
Reset
1
1
1
Note: R = Read W = Write X = Indeterminate
4
R/W
1
3
R/W
1
2
1
R/W R/W
1
1
0
R/W
1
Bit/
Field
P63
P62
P61
P60
P63 I/O
definition
Bit
Position
7
6
5
4
3
R/W Value Description
R/W
0 Open-Drain Output
1 Push-Pull Output - POR
R/W
0 Open-Drain Output
1 Push-Pull Output - POR
R/W
0 Open-Drain Output
1 Push-Pull Output - POR
R/W
0 Open-Drain Output
1 Push-Pull Output - POR
R/W
0 Data Output
1 Data Input - POR
PS001301-0800