User`s manual

1: INTERFACING TO THE PHILIPS MIPS PR31500/PR31700 PROCESSOR
5-6 EPSON APPLICATION NOTES (S19A-G-005-05)
1.3.3 IT8368E Configuration
The IT8368E provides eleven multi-function IO pins (MFIO). The IT8368E (or the first in a two-
IT8368E implementation) must have both “Fix Attribute/IO” and “VGA” modes on. When both
these modes are enabled, the MFIO pins provide control signals needed by the S1D13504 host bus
interface, and a 16M byte portion of the system PC Card attribute and IO space is allocated to
address the S1D13504. When accessing the S1D13504 the associated card-side signals are disabled
in order to avoid any conflicts.
Note: When a second IT8368E is used, that circuit should not be set in VGA mode.
For mapping details, refer to Section 1.3.4, “Memory Mapping and Aliasing”. For further informa-
tion on configuring the IT8368E, refer to the “IT8368E PC Card/GPIO Buffer Chip Specification”.
1.3.4 Memory Mapping and Aliasing
When the PR31500/PR31700 accesses the PC Card slots without the ITE IT8368E, its system mem-
ory is mapped as in Table 1-3 “PR31500/PR31700 to Unbuffered PC Card Slots System Address
Mapping”.
Note: Bits CARD1IOEN and CARD2IOEN need to be set in the PR31500/PR31700 Memory
Configuration Register 3.
When the PR31500/PR31700 accesses the PC Card slots buffered through the ITE IT8368E, bits
CARD1IOEN and CARD2IOEN are ignored and the attribute/IO space of the PR31500/PR31700 is
divided into Attribute, IO and S1D13504 access. Table 1-4 “PR31500/PR31700 to PC Card Slots
Address Remapping using the IT8368E” provides all the details of the Attribute/IO address re-allo-
cation by the IT8368E.
Table 1-3 PR31500/PR31700 to Unbuffered PC Card Slots System Address Mapping
PR31500/31700
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 1-4 PR31500/PR31700 to PC Card Slots Address Remapping using the IT8368E
IT8368E Uses PC Card Slot # Philips 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