Epson S1D13504 manual MC68328 Chip Select Configuration, Option Memory Selection

Models: S1D13504

1 504
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Epson Research and Development

 

Vancouver Design Center

 

 

Table 4-3: Memory Configuration

MD7

MD6

Option

Memory Selection

 

 

 

 

0

0

1

Symmetrical 256K x 16 DRAM

 

 

 

 

0

1

2

Symmetrical 1M x 16 DRAM

 

 

 

 

1

0

3

Asymmetrical 256K x 16 DRAM

 

 

 

 

1

1

4

Asymmetrical 1M x 16 DRAM

 

 

 

 

4.3 MC68328 Chip Select Configuration

In the example interface, chip select CSB3 is used to control the S1D13504. A 4M byte address space is used. The S1D13504 control registers are mapped into the bottom half of this address block, while the display buffer is mapped into the top half. The chip select should have its RO (Read Only) bit set to 0, and the WAIT field (Wait states) should be set to 111 to allow the S1D13504 to terminate bus cycles externally.

S1D13504

Interfacing to the Motorola MC68328 "Dragonball" Microprocessor

X19A-G-013-02

Issue Date: 01/02/02

Page 434
Image 434
Epson S1D13504 manual MC68328 Chip Select Configuration, Option Memory Selection