DataSheet_SB16C1053APCI_v106

SB16C1053APCI
PCI Target Controller with 2 Serial, 1 Parallel and MIO Bus
PCI to 2S+1P with MIO Bus Bridge
JULY 2013 REV 1.06
84
13.2.1 Register Descriptions in the Compatibility Mode
Table 13–4: Basic Parallel Port Register
Address
(BAR2 +)
Abbreviation
Register Name
Access
0h
DATA
Data Register
R/W
1h
STAT
Status Register
R
2h
CTRL
Control Register
R/W
Table 13–5: Status Register Description of Parallel Port
Status Register
Bit
Name
Description
7
nBUSY
If nBUSY is asserted, it indicates that the peripheral is busy.
6
nACK
If nACK is asserted, it indicates that the peripheral has received a
data byte and it is ready for another data byte.
5
PE
If PE is asserted, it indicates that the peripheral is out of paper.
4
SLCT
If SLCT is asserted, it indicates that the peripheral is selected.
3
nERR
If nERR is asserted, it indicates that the peripheral has a fault.
2
-
Reserved. Always returns 0.
1
-
Reserved. Always returns 0.
0
TIMEOUT
When timeout occurs, this signal is asserted to high. (EPP only)
Table 13–6: Control Register Description of Parallel Port
Bit
Name
Description
7
Reserved. Always returns 0.
6
Reserved. Always returns 0.
5
PDIR
Direction Bit.
PDIR = 0, forward direction
PDIR = 1, reverse direction
4
INTEN
If it is asserted, it allows the peripheral to interrupt the CPU.
3
SLCTIN
If it is asserted, it means the host has selected the peripheral.
2
NINIT
If it is asserted, the peripheral is initialized.
1
AUTOFD
This tells the printer to advance the paper by one line each time a
carriage return is received.
0
STROBE
If it is asserted, this instructs the peripheral to accept the data on
the data bus.
Default value of Control Register is 00h after reset.