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
83
13.2 Compatibility Mode
Compatibility mode provides an asynchronous, byte wide, forward channel (host-to-peripheral),
with the data and status lines used according to original definitions, as per the original
Centronics port. It is also known as SPP, industry Standard Parallel Port.
13.2.1 Pin Descriptions in the Compatibility Mode
Table 13–3: Pin Description in Compatibility Mode
Signal
Name
Type
Compatibility Protocol Signal Description
STROBE#
O
STROBE: The host asserts STROBE# to latch data into the
peripheral devices. This signal is controlled via the CTRL register.
BUSY
I
BUSY: BUSY is asserted by the peripheral to indicate that
peripheral device is not ready to receive data from host. This
signal is indicated via the STAT register.
ACK#
I
Acknowledge: The printer asserts ACK to indicate that printer has
received data from host and printer is ready for new data. This
signal is indicated via the STAT register.
SELECT
I
SELECT: The peripheral asserts to indicate that peripheral device
is on line. This signal is indicated via the STAT register.
PERROR
I
Paper Error: The peripheral device asserts PERROR to indicate
that an error has occurred. This signal is indicated via the STAT
register.
FAULT#
I
FAULT: The peripheral device asserts this signal to indicate that an
error occurred. This signal is indicated via the STAT register.
INIT#
O
INITIALIZE: The host asserts INIT# to reset the peripheral device.
This signal is controlled via the CTRL register.
AUTOFD#
O
Auto Feed: The host asserts to make the peripheral into auto-line
feed mode. This signal is controlled via the CTRL register.
PD[7:0]
O
DATA: these are 8-bit forward channel data.
SLCTIN#
O
Select Input: The host asserts SLCTIN# to select a peripheral
device. This signal is controlled via the CTRL register.