Epson manual MCF5307 To S1D13504 Interface, Hardware Connections

Models: S1D13504

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Epson Research and Development

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Vancouver Design Center

4 MCF5307 To S1D13504 Interface

4.1 Hardware Connections

The interface between the S1D13504 and the MCF5307 requires minimal glue logic. Since the S1D13504 has a single chip select input for both display RAM and registers, a single external gate is required to produce a negative-OR function of the two MCF5307 chip selects. A single resistor is used to speed up the rise time of the WAIT# (TA) signal when terminating the bus cycle.

BS# (bus start) is not used in this implementation and should be tied low (connected GND).

The following diagram shows a typical implementation of the MCF5307 to S1D13504 interface.

MCF5307

 

S1D13504

A21

 

M/R#

A[20:0]

 

AB[20:0]

D[31:16]

 

DB[15:0]

CS4

74AC08 (or equiv.)

CS#

 

CS5

 

 

 

 

Vcc

 

 

470

 

TA

 

WAIT#

WE1

 

WE1#

WE0

 

WE0#

OE

 

RD1#

 

 

RD0#

BCLK0

 

BUSCLK

 

System RESET

RESET#

 

 

Note:

When connecting the S1D13504 RESET# pin, the system designer should be aware of all conditions that may reset the S1D13504 (e.g. CPU reset can be asserted during wake-up from power-down modes, or during debug states).

Figure 4-1: Typical Implementation of MCF5307 to S1D13504 Interface

Note

For pin mapping see Table 3-1:, “Generic MPU Host Bus Interface Pin Mapping” .

Interfacing to the Motorola MCF5307 "Coldfire" Microprocessor

S1D13504

Issue Date: 01/02/02

X19A-G-011-07

Page 415
Image 415
Epson manual MCF5307 To S1D13504 Interface, Hardware Connections