82091AA Datasheet, PDF (21/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
2 6 1 COMPATIBILITY PROTOCOL SIGNAL DESCRIPTION
Except for the data bus the 82091AA and compatibility protocol signal names are the same For the data bus
the 82091AA signal names PD 7 0 corresponds to the compatibility protocol signal names Data 8 1
82091AA
Signal
Name
STROBE
BUSY
ACK
SELECT
PERROR
FAULT
INIT
AUTOFD
PD 7 0
SELECTIN
Type
Compatibility Protocol Signal Name and Description
O STROBE The host asserts STROBE to latch data into the peripheral device’s
input latch This signal is controlled via the PCON Register
I
BUSY BUSY is asserted by the peripheral to indicate that the peripheral device
is not ready to receive data The status of this signal line is reported in the PSTAT
Register
I
ACKNOWLEDGE The printer asserts this signal to indicate that it has received
the data and is ready for new data The status of this signal line is reported in the
PSTAT Register
I
SELECT SELECT is asserted by the peripheral device to indicate that the device
is on line The status of this signal line is reported in the PSTAT Register
I
PAPER ERROR The peripheral device asserts PERROR to indicate that it has
encountered an error in the paper path The exact meaning varies from peripheral
device to peripheral device The status of this signal line is reported in the PSTAT
Register
I
FAULT FAULT is asserted by the peripheral device to indicate that an error
has occurred The status of this signal line is reported in the PSTAT Register
O INITIALIZE The host asserts INIT to issue a hardware reset to the peripheral
device This signal is controlled via the PCON Register
O AUTO FEED AUTOFD is asserted by the host to put the peripheral device into
auto-line feed mode This means that when software asserts this signal the
printer is instructed to advance the paper one line for each carriage return
encountered This signal is controlled via the PCON Register
O DATA Forward channel data
O SELECT INPUT SELECTIN is asserted by the host to select a peripheral
device This signal is controlled via the PCON Register
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