sed1355 ETC-unknow, sed1355 Datasheet - Page 467

• Manufacturer Part Number: sed1355
• Description: Sed1355 Embedded Ramdac Lcd/crt Controller
• Manufacturer: ETC-unknow

Epson Research and Development
Vancouver Design Center
4 Direct Connection to the Toshiba TX3912
4.1 Hardware Description
Interfacing to the Toshiba MIPS TX3912 Processor
Issue Date: 99/05/05
Note:
ENDIAN
When connecting the SED1355 RESET# pin, the system designer should be aware of all
conditions that may reset the SED1355 (e.g. CPU reset can be asserted during wake-up
from power-down modes, or during debug states).
The SED1355 was specifically designed to support the Toshiba MIPS TX3912 processor.
When configured, the SED1355 will utilize one of the PC Card slots supported by the
processor.
the Attribute and IO address range. The processor provides address bits A[12:0], with
A[23:13] being multiplexed and available on the falling edge of ALE. Peripherals requiring
more than 8K bytes of address space would require an external latch for these multiplexed
bits. However, the SED1355 has an internal latch specifically designed for this processor
making additional logic unnecessary. To further reduce the need for external components,
the SED1355 has an optional BUSCLK divide-by-2 feature, allowing the high speed
DCLKOUT from the processor to be directly connected to the BUSCLK input of the
SED1355. An optional external oscillator may be used for BUSCLK since the SED1355
will accept host bus control signals asynchronously with respect to BUSCLK.
The following diagram shows a typical implementation of the interface.
In this example implementation, the SED1355 occupies one PC Card slot and resides in
TX3912
Figure 4-1: Typical Implementation of Direct Connection
CARDxWAIT*
CARDIOWR*
CARDxCSH*
CARDIORD*
CARDxCSL*
CARDREG*
DCLKOUT
D[23:16]
D[31:24]
A[12:0]
WE*
ALE
RD*
V
...or...
DD
System RESET
Oscillator
See text
pull-up
V
DD
(+3.3V)
AB20
M/R#
CS#
BS#
AB[16:13]
AB[12:0]
DB[15:8]
DB[7:0]
AB19
AB18
AB17
WE1#
RD/WR#
RD#
WE0#
WAIT#
RESET#
BUSCLK
CLKI
SED1355
X23A-G-010-03
SED1355
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