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Epson Research and Development
Vancouver Design Center
S1D13704
Interfacing to the Motorola MC68328 ‘Dragonball’ Microprocessor
X26A-G-007-03
Issue Date: 01/02/12
4 MC68328 To S1D13704 Interface
4.1 Hardware Description
The interface between the MC68328 and the S1D13704 can be implemented using either
the MC68K #1 or Generic #1 host bus interface of the S1D13704.
4.1.1 Using The MC68K #1 Host Bus Interface
The MC68328 multiplexes dual functions on some of its bus control pins (specifically
UDS, LDS, and DTACK). In implementations where all of these pins are available for use
as bus control pins, then the S1D13704 interface is a straightforward implementation of the
“MC68K #1” host bus interface. For further information on this host bus interface, refer to
the S1D13704 Hardware Functional Specification, document number
X26A-A-001-xx.
The following diagram shows a typical implementation of the MC68328 to S1D13704
using the MC68K #1 host bus interface.
Figure 4-1: Typical Implementation of MC68328 to S1D13704 Interface - MC68K #1
MC68328
S1D13704
A[15:0]
D[15:0]
DTACK
UDS
LDS
R/W
CLK0
RESET
AB[15:1]
DB[15:0]
CS#
WAIT#
WE1#
AB0
RD/WR#
RD#
BUSCLK
RESET#
Vcc
470
CSB3
AS
BS#
Vcc
*