PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 131

• Manufacturer Part Number: PC87307VUL
• Description: PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
• Manufacturer: National Semiconductor

6.7 PARALLEL PORT REGISTER BITMAPS
6.7.1
0
0
1
1
7
7
7
7
Printer Status
Reserved
D7
A7
0
0
1
1
6
6
6
6
EPP Modes Parallel Port Register Bitmaps
ACK Status
D6
Reserved
A6
0
1
0
0
5
5
5
5
D5
Direction Control
A5
PE Status
0
1
0
0
4
4
4
4
D4
SLCT Status
Interrupt Enable
A4
0
0
1
0
3
3
3
3
D3
A3
Parallel Port Input Control
ERR Status
0
0
1
1
2
2
2
2
Data Bits
EPP Device or
Register Selection
Address Bits
D2
A2
Printer Initialization Control
IRQ Status
0
1
0
0
1
1
1
1
Automatic Line Feed Control
D1
A1
0
0
1
Reserved
0
0
0
0
0
D0
Reset
Required
A0
Reset
Required
Reset
Required
Reset
Required
Time-Out Status
Data Strobe Control
SPP or EPP Control
SPP or EPP Status
SPP or EPP Data
Register (DTR)
Register (CTR)
Register(STR)
EPP Address
Parallel Port (Logical Device 4)
Offset 00h
Offset 02h
Offset 03h
Offset 01h
Register
131
0
0
0
7
7
7
0
7
D7
D15
D23
D31
0
0
0
6
6
6
0
6
D6
D14
D22
D30
0
0
0
5
5
5
0
5
D5
D13
D21
D29
0
0
0
4
4
4
0
4
D4
D12
D20
D28
0
0
0
3
3
3
0
3
D3
D11
D19
D27
0
0
0
2
2
2
0
EPP Device
Read or Write Data
2
EPP Device
Read or Write Data
D2
D10
D18
D26
0
0
0
EPP Device
Read or Write Data
EPP Device
Read or Write Data
1
1
1
0
1
D1
D17
D25
0
0
0
0
0
0
D9
0
0
D0
D16
Reset
Required
Reset
Required
Reset
Required
D24
D8
Reset
Required
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Offset 04h
Offset 05h
Offset 06h
Offset 07h
Register 0
Register 1
Register 2
Register 3
EPP Data
EPP Data
EPP Data
EPP Data