SCD1283 INTEL [Intel Corporation], SCD1283 Datasheet - Page 46

• Manufacturer Part Number: SCD1283
• Description: IEEE 1284-Compatible Parallel Interface
• Manufacturer: INTEL [Intel Corporation]

CD1283 — IEEE 1284-Compatible Parallel Interface
5.10.2
46
Figure 14. Motorola 68020 Interface
SYSTEM
68020
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.
generalized interface to a 68020 device.
CONTROL
ADDRESS
DSACK1*
DSACK0*
IPL[2:0]
FC[2:0]
DATA
DMA
R/W*
AS*
DS*
A[31:9]
ADDRESS
DECODE
LOGIC
ENCODING
TRANSFER
PRIORITY
CONTROL
A[8:2]
Figure 14
CS*
SVCACKP*
A[6:0]
DB[15:0]
DS*
R/W*
SVCREQP*
DMAREQ*
DMAACK*
DTACK*
CD1283
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