Z90251 Datasheet, PDF (71/97 Pages) Zilog, Inc. – eZVision 200 Television Controllers with OSD

Z90255 ROM and Z90251 OTP
32 KB Television Controller with OSD
63
Table 47 Port 5 Direction Control Register 0Eh: Bank B (PRT5_DRT)
Bit
7
6
5
R/W
Reset
R/W R/W R/W
x
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
Reserved
P56 I/O Definition
P55 I/O Definition
P54 I/O Definition
P53 I/O Definition
P52 I/O Definition
P51 I/O Definition
P50 I/O Definition
Bit
Position
7
6
5
4
3
2
1
0
R/W Value Description
R
Return 1
W
No Effect
R/W
0 Defines P56 as Output
1 Defines P56 as Input-POR
R/W
0 Defines P55 as Output
1 Defines P55 as Input-POR
R/W
0 Defines P54 as Output
1 Defines P54 as Input-POR
R/W
0 Defines P53 as Output
1 Defines P53 as Input-POR
R/W
0 Defines P52 as Output
1 Defines P52 as Input-POR
R/W
0 Defines P51 as Output
1 Defines P51 as Input-POR
R/W
0 Defines P50 as Output
1 Defines P50 as Input-POR
7.3 Port 6 Data Register
Table 48 Port 6 Data Register 03h: Bank F (PRT6_DTA)
Bit
7
6
5
4
R/W
R/W R/W R/W R/W
Reset
1
1
1
1
Note: R = Read W = Write X = Indeterminate
3
R/W
1
2
R/W
1
1
R/W
1
0
R/W
1
PS001301-0800