Page 10
EPSON Research and Development
Vancouver Design Center
S1D13704
Interfacing to the Toshiba MIPS TX3912 Processor
X26A-G-004-02
Issue Date: 01/02/12
3 System Design Using the ITE IT8368E PC Card Buff er
If the system designer uses the ITE IT8368E PC Card and multiple-function I/O buffer, the
S1D13704 can be interfaced so that it ’shares’ a PC Card slot. The S1D13704 is mapped to a rarely-
used 16M byte portion of the PC Card slot buffered by the IT8368E. This makes the S1D13704
virtually transparent to PC Card devices that use the same slot.
3.1 Hardware Description
The ITE8368E has been specially designed to support EPSON LCD controllers. The ITE IT8368E
provides eleven Multi-Function IO pins (MFIO). Configuration registers may be used to allow these
MFIO pins to provide the control signals required to implement the S1D13704 CPU interface.
The TX3912 processor only provides addresses A[12:0], therefore devices requiring more address
space must use an external device to latch A[25:13]. The IT8368E’s MFIO pins can be configured
to provide this latched address.
Figure 3-1: S1D13704 to TX3912 Connection Using an IT8368E
IT8368E
S1D13704
HA[12:0]
AB[12:0]
HD[31:24]
DB[7:0]
LHA[23]/MFIO[10]
WE1#
WE0#
RD1#
RD0#
CS#
LHA[22]/MFIO[9]
LHA[21]/MFIO[8]
LHA[20]/MFIO[7]
LHA[19]/MFIO[6]
WAIT#
CARDxWAIT*
RESET#
AB[15:13]
TX3912
HD[23:16]
DB[15:8]
DCLKOUT
ENDIAN
System RESET
LHA[15:13]/
Oscillator
...or...
pull-up
V
DD
BCLK
CLKI
See text
Clock divider
BS#
IO V
DD
, CORE V
DD
+3.3V
MFIO[2:0]
*