CD1283 Datasheet, PDF (46/94 Pages) Intel Corporation – IEEE 1284-Compatible Parallel Interface

CD1283 — IEEE 1284-Compatible Parallel Interface
5.10.2
Interfacing to a Motorola^ Microprocessor-Based System
Interfacing to a Motorola 68000 family device is relatively simple. Bus timing and interface signal
definitions closely match those of the 68000 microprocessor, which allows a direct connection.
With later versions (68020, 68030), some additional logic is required to generate the DSACK0*
and DSACK1* functions that replace the DTACK* on earlier devices. Figure 14 shows a
generalized interface to a 68020 device.
Figure 14. Motorola^ 68020 Interface
68020
SYSTEM
CD1283
AS*
FC[2:0]
ADDRESS
A[31:9]
ADDRESS
DECODE
LOGIC
CS*
SVCACKP*
DATA
DS*
R/W*
A[8:2]
A[6:0]
DB[15:0]
DS*
R/W*
IPL[2:0]
PRIORITY
ENCODING
SVCREQP*
DMA
CONTROL
DSACK1*
DSACK0*
TRANSFER
CONTROL
DMAREQ*
DMAACK*
DTACK*
46
Datasheet