Epson S1D13705 technical manual IT8368E Configuration, 16M byte Card 1 IO, At 128K byte intervals

Page 16	Epson Research and Development
	Vancouver Design Center

5.2 IT8368E Configuration

The IT8368E provides eleven multi-function IO pins (MFIO). The IT8368E 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 S1D13705 host bus interface, and a 16M byte portion of the system PC Card attribute and IO space is allocated to address the S1D13705. When accessing the S1D13705 the associated card-side signals are disabled in order to avoid any conflicts.

For mapping details, refer to section 3.3: “Memory Mapping and Aliasing.” For connection

details see Figure 5-1:“S1D13705 to TMPR3912 Connection Using an IT8368E,” on page 15. For further information on the IT8368E, refer to the IT8368E PC Card/GPIO Buffer Chip Specification.

Note

When a second IT8368E is used, that circuit should not be set in VGA mode.

5.3 Memory Mapping and Aliasing

When the TMPR3912 accesses the PC Card slots without the ITE IT8368E, its system memory is mapped as in Table 5-1:TMPR3912 to PC Card Slots Address Mapping With and Without the IT8368E.

Note

Bit CARD1IOEN or CARD2IOEN, depending on which card slot is used, must to be set to 0 in the TMPR3912 Memory Configuration Register 3.

When the TMPR3912 accesses the PC Card slots buffered through the ITE IT8368E, bits CARD1IOEN and CARD2IOEN are ignored and the attribute/IO space of the TMPR3912 is divided into Attribute, I/O and S1D13705 access. Details of the Attribute/IO address reallocation by the IT8368E are found in Table 5-1:TMPR3912 to PC Card Slots Address Mapping With and Without the IT8368E.

Table 5-1: TMPR3912 to PC Card Slots Address Mapping With and Without the IT8368E

PC Card	TMPR3912	Size	Using the ITE IT8368E	Direct Connection,	Direct Connection,
Slot #	Address			CARDnIOEN=0	CARDnIOEN=1
	0800 0000h	16M byte	Card 1 IO
			S1D13705 (aliased 128	S1D13705
1	0900 0000h	16M byte	times	(aliased 512 times	Card 1 IO
			at 128K byte intervals)	at 128K byte intervals)
	0A00 0000h	32M byte	Card 1 Attribute
	6400 0000h	64M byte	Card 1 Memory	S1D13705 (aliased 512 times at 128K byte intervals)

S1D13705	Interfacing to the Toshiba MIPS TMPR3912 Microprocessor
X27A-G-004-02	Issue Date: 01/02/13