SCD1284 INTEL [Intel Corporation], SCD1284 Datasheet - Page 18

• Manufacturer Part Number: SCD1284
• Description: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
• Manufacturer: INTEL [Intel Corporation]

CD1284 — IEEE 1284-Compatible Parallel Interface Controller
3.2
18
Pin List
The following conventions are used in the pin-description tables:
5V
GND
RESET*
Names
PerBsy
nDatAv
HstBsy
AkDaR
HstClk
PerClk
A_128
•
•
•
•
•
•
•
•
•
XFlag
nInit
Pin Name
Pin
4
q
(*) after a name indicates that the signal is active-low
‘I’ indicates the pin is input-only
‘O’ indicates the pin is output-only
‘I/O’ indicates the pin is bidirectional
‘OD’ indicates an open-drain output that the user must tie to V
(usually about 1 k )
‘AR’ indicates active release (pin drives to ‘1’ and releases to ‘OD’)
‘TS’ indicates tristate
a ‘–’ indicates ascending pin numbers
a ‘:’ indicates descending pin numbers
AUTOFD*
STROBE*
Compati-
SLCTIN*
SELECT
FAULT*
PError
BUSY
ACK*
bility
INIT*
Type
–
–
I
(Sheet 1 of 3)
Reverse
AkDaRq
A_1284
HstBsy
PerBsy
nDatAv
Nibble
HstClk
PerClk
Number
Mode
XFlag
of Pins
nInit
5
7
1
Outputs
Inputs
Reverse
AkDaRq
A_1284
nDatAv
40, 52, 72,
HstBsy
PerBsy
11, 50, 65,
PerClk
HstClk
Mode
XFlag
1,10, 30,
Number
Byte
nInit
81, 100
Pin
91
79
ECP Mode
nRevReq
nPerReq
A_1284
nAkRev
HstAck
PerAck
HstClk
PerClk
XFlag
Reset
State
USER1
USER2
USER3
nDStrb
nAStrb
nWrite
Mode
nWait
EPP
nInit
Intr
CC
through a pull-up resistor
Datasheet