User`s manual

6: TECHNICAL DESCRIPTION
4-8 EPSON S5U13504P00C REV1.0 ISA BUS EVALUATION BOARD
USER’S MANUAL (S19A-G-004-05)
6.4 Decode Logic
This board design utilizes the Generic MPU Interface of the S5U13504P00C (see the “S1D13504
Hardware Functional Specification,” document number S19A-A-002-xx).
All required decode logic between the ISA bus and the S1D13504 is provided through a
TIBPAL22V10 PAL (U3, socketed).
6.5 Clock Input Support
The input clock frequency can be up to 40.0MHz for the S1D13504. A 40.0MHz oscillator (U4,
socketed) is provided as the clock (CLKI) source.
6.6 Monochrome LCD Panel Support
The S1D13504 supports 4 and 8-bit dual and single, monochrome passive LCD panels. All neces-
sary signals are provided on the 40-pin ribbon cable header J6. The interface signals are alternated
with grounds on the cable to reduce cross-talk and noise-related problems.
Refer to Table 3-1, “LCD Signal Connector (J6),” on page 3 for connection information.
6.7 Color Passive LCD Panel Support
The S1D13504 directly supports 4/8/16-bit dual and single, color passive LCD panels. All the neces-
sary signals are provided on the 40-pin ribbon cable header J6. The interface signals are alternated
with grounds on the cable to reduce cross-talk and noise-related problems.
The S1D13504 cannot support 12 or 18-bit TFT panels when CRT is enabled. FPDAT [15:8] is used
for RAMDAC data and is not available for LCD. Refer to the “S1D13504 Hardware Functional
Specification,” document number S19A-A-002-xx for details.
Refer to Table 3-1, “LCD Signal Connector (J6),” on page 3 for connection information.
6.8 Color TFT LCD Panel Support
The S1D13504 supports 9/12/18-bit active matrix color TFT panels. All the necessary signals can
also be found on the 40-pin LCD connector J6. The interface signals are alternated with grounds on
the cable to reduce cross-talk and noise-related problems.
When supporting an 18-bit TFT panel, the S1D13504 can display 64K of a possible 262K colors. A
maximum 16 of the possible 18-bits of LCD data is available from the S1D13504. Refer to the
“S1D13504 Hardware Functional Specification,” document number S19A-A-002-xx for details.
The S1D13504 cannot support 12 or 18-bit TFT panels when CRT is enabled. FPDAT [15:8] is used
for RAMDAC data and is not available for LCD. Refer to the “S1D13504 Hardware Functional
Specification,” document number S19A-A-002-xx for details.
Refer to Table 3-1, “LCD Signal Connector (J6),” on page 3 for connection information.
6.9 External CMOS RAMDAC Support
This evaluation board design provides CRT support with the addition of an external RAMDAC
(BrookTree BT481A or equivalent). The presence of an external RAMDAC/CRT can be determined
by software once the S1D13504 is properly initialized after power-up.
The BT481A RAMDAC is provided on the board to fully test all of the CRT display modes avail-
able. Refer to the section “Display Support” of the “S1D13504 Hardware Functional Specifica-
tion,” document number S19A-A-002-xx for details.
The overlay function and sprite/hardware cursor display features are not supported.