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Epson Research and Development Page 11
Vancouver Design Center
Interfacing to the Motorola MCF5307 "ColdFire" Microprocessor S1D13708
Issue Date: 01/11/25 X39A-G-010-01
3 S1D13708 Host Bus Interface
The S1D13708 directly supports multiple processors. The S1D13708 implements a 16-bit
Generic #1 Host Bus Interface which is most suitable for direct connection to the Motorola
MFC5307 microprocessor. Generic #1 supports a Chip Select and an individual Read
Enable/Write Enable for each byte.
The Generic #1 Host Bus Interface is selected by the S1D13708 on the rising edge of
RESET#. After RESET# is released, the bus interface signals assume their selected config-
uration. For details on the S1D13708 configuration, see Section 4.2, “S1D13708 Hardware
Configuration” on page 14.
The S1D13708 clock (CLKI) is taken from the system host bus. The system clock source
will drive all required internal clocks. If they are not used, the CLKI2 and XTAL inputs
should be tied to ground.
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
S1D13708
Pin Names
Motorola MCF5307
AB[16:0] A[16:0]
DB[15:0] D[31:16]
WE1# BWE1
CS# CS4
M/R# A17
CLKI BCLK0
BS# Connect to IO V
DD
RD/WR# OE
RD# OE
WE0# BWE0
WAIT# TA
RESET# system RESET