Epson Research and Development Page 19
Vancouver Design Center
Interfacing to the Toshiba MIPS TX3912 Processor S1D13504
Issue Date: 01/02/02 X19A-G-012-04
5.4 Memory Mapping and Aliasing
When the TX3912 accesses the PC Card slots without the ITE IT8368E, its system memory
is mapped as in Table , “”.
Note
Bits CARD1IOEN and CARD2IOEN need to be set in the TX3912 Memory
Configuration Register 3.
When the TX3912 accesses the PC Card slots buffered through the ITE IT8368E, bits
CARD1IOEN and CARD2IOEN are ignored and the attribute/IO space of the TX3912 is
divided into Attribute, IO and S1D13504 access. Table 5-2:, TX3912 to PC Card Slots
Address Remapping using the IT8368E provides all the details of the Att ribute/IO addr ess
re-allocation by the IT8368E.
Table 5-1: TX3912 to Unbuffered PC Card Slots System Address Mapping
TX3912 Address Size Function
(CARDnIOEN=0) Function
(CARDnIOEN=1)
0800 0000h 64Mb Card 1 Attribute Card 1 IO
0C00 0000h 64Mb Card 2 Attribute Card 2 IO
6400 0000h 64Mb Card 1 Memory
6400 0000h 64Mb Card 2 Memory
Table 5-2: TX3912 to PC Card Slots Address Remapping using the IT8368E
IT8368E Uses PC Card Slot # TX3912 Address Size Function
1
0800 0000h 16M byte Card 1 IO
0900 0000h 8M byte S1D13504 registers,
aliased 131,072 times at 64 byte intervals
0980 0000h 8M byte S1D13504 display buffer,
aliased 4 times at 2Mb intervals
0A00 0000h 32M byte Card 1 Attribute
6400 0000h 64M byte Card 1 Memory
2
0C00 0000h 16M byte Card 2 IO
0D00 0000h 8M byte S1D13504 registers,
aliased 131,072 times at 64 byte intervals
0D80 0000h 8M byte S1D13504 display buffer,
aliased 4 times at 2Mb intervals
0E00 0000h 32M byte Card 2 Attribute
6800 0000h 64M byte Card 2 Memory