Epson S1D13706 - 3 S1 D13706 Host Bus Interface; Host Bus Interface Pin Mapping

Epson Research and Development
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Interfacing to the Motorola MC68VZ328 Dragonball Microprocessor S1D13706
Issue Date: 01/02/26 X31B-G-016-02
3 S1D13706 Host Bus Interface
The S1D13706 directly supports multiple processors. The S1D13706 implements a
Dragonball Host Bus Interface which directly supports the Motorola MC68VZ328 micro-
processor.
The Dragonball Host Bus Interface is selected by the S1D13706 on the rising edge of
RESET#. After RESET# is released, the bus interface signals assume their selected config-
uration. For details on the S1D13706 configuration, see Section 4.2, “S1D13706 Hardware
Configuration” on page 12.
3.1 Host Bus Interface Pin Mapping
The following table shows the functions of each Host Bus Interface signal.
Table 3-1: Host Bus Interface Pin Mapping
S1D13706
Pin Names
Motorola MC68VZ328
AB[16:0] A[16:0]
DB[15:0] D[15:0]
WE1# UWE
CS# CSx
M/R# External Decode
CLKI CLKO
BS#
Connect to HIO
VDD
from the
S1D13706
RD/WR#
Connect to HIO
VDD
from the
S1D13706
RD# OE
WE0# LWE
WAIT# DTACK
RESET# System RESET