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Epson Research and Development
Vancouver Design Center
S1D13503
S5U13503B00C Rev. 1.0 Evaluation Board User Manual
X18A-G-007-05
Issue Date: 01/01/30
2 INSTALLATION AND CONFIGURATION
The S1D13503 uses the display memory data lines (VD[15:0]) as configuration inputs which are read on power-up. For the
purpose of this design, most of these configuration inputs have been factory set and therefore are not configurable. An eight
position DIP switch is provided for the selection of the following:
Note
The polarity of the Configuration Dip Switches is Closed = “1” or “high”, Open = “0” or “low”.
Note
VD[15:0] have internal pull-down resistors and therefore external pull-up resistors are only required if
the configuration option requires a “1” state on power-up.
Factory set fixed options on this board are:
•
16-bit display memory interface.
•
All 128K bytes of video memory is available at memory segment $D with software selecting one of two 64K
memory banks (See “SRAM Support” on page 14).
•
This board is pre-set to use indexed I/O with address $03y0 (0000 0011 0yyy 000x), where x is don’t care
and yyy can be configured with dip-switch SW1-5 through SW1-7. The factory setting of yyy = 001, i.e., I/O
address = $0310 and $0311.
Direct-mapping I/O is only available for Non-ISA Bus support. When using direct-mapped I/O, the I/O address is
$03yx (0000 0011 0yyy xxxx), where x is don’t care and yyy can be configured with dip-switch SW1-5 through SW1-7.
If yyy = 001, then the I/O address for Aux[00] = $0310, I/O address for Aux[01] = $0311, I/O address for AUX[02] = $0312
and so on. (See Non-ISA Bus Support, on page 14.)
Table 2-1: Configuration DIP Switch Settings
Switch
Signal
Closed
Open
SW1-1
VD0
16-bit ISA Bus interface
8-bit ISA Bus interface
SW1-2
VD1
Direct-mapping I/O
Indexed I/O
SW1-3
VD2
M68K CPU Interface
ISA Bus Interface
SW1-4
VD3
Byte-swap high and low data bytes
No byte-swap
SW1-5
VD7
I/O mapping address bit 4
See Table 2-2, “I/O Mapping Example”
SW1-6
VD8
I/O mapping address bit 5
SW1-7
VD9
I/O mapping address bit 6
SW1-8
-
Reserved
Reserved
Table 2-2: I/O Mapping Example
bit 6 bit 5 bit 4
I/O Mapping Address (Hex)
0
0
1
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