S1D13505 Configuration; Memory Mapping And Aliasing - Epson S1D13505F00A Technical Manual

4: INTERFACING TO THE PHILIPS MIPS PR31500/PR31700 PROCESSOR
S1D13505 Configuration
The S1D13505 latches MD15 through MD0 to allow selection of the bus mode and other configura-
tion data on the rising edge of RESET#. For details on configuration, refer to the "S1D13505 Hard-
ware Functional Specification".
The table below shows those configuration settings relevant to the Philips PR31500/PR31700 host
bus interface.
Table 4-2 S1D13505 Configuration for Direct Connection
S1D13505
Pin Name
MD0 8-bit host bus interface
MD[3:1] 111 = Philips PR31500/PR31700 host bus interface if Alternate host bus interface is selected
MD4 Little Endian
MD5 WAIT# is active high (1 = insert wait state)
MD11 Alternate host bus interface selected
MD12 BUSCLK input divided by two: use with
DCLKOUT
= configuration for Philips PR31500/PR31700 host bus interface

Memory Mapping and Aliasing

The PR31500/PR31700 uses a portion of the PC Card Attribute and IO space to access the
S1D13505. The S1D13505 responds to both PC Card Attribute and IO bus accesses, thus freeing the
programmer from having to set the PR31500/PR31700 Memory Configuration Register 3 bit
CARD1IOEN (or CARD2IOEN if slot 2 is used). As a result, the PR31500/PR31700 sees the
S1D13505 on its PC Card slot as described in the table below.
Table 4-3 PR31500/PR31700 to PC Card Slots Address Remapping for Direct Connection
S1D13505 Uses
Philips Address
PC Card Slot #
1 0800 0000h
0900 0000h
0980 0000h
0A00 0000h
6400 0000h
2 0C00 0000h
0D00 0000h
0D80 0000h
0E00 0000h
6800 0000h
5-14
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Value on this pin at rising edge of RESET# is used to configure:
1 (V )
DD
16-bit host bus interface
Big Endian
WAIT# is active low (0 = insert wait state)
Primary host bus interface selected
BUSCLK input not divided: use with exter-
nal oscillator
Size
16M byte Card 1 IO or Attribute
8M byte S1D13505 registers,
aliased 4 times at 2M byte intervals
8M byte S1D13505 display buffer,
aliased 4 times at 2M byte intervals
32M byte Card 1 IO or Attribute
64M byte Card 1 Memory
16M byte Card 2 IO or Attribute
8M byte S1D13505 registers,
aliased 4 times at 2M byte intervals
8M byte S1D13505 display buffer,
aliased 4 times at 2M byte intervals
32M byte Card 2 IO or Attribute
64M byte Card 2 Memory
EPSON
0 (V )
SS
Function
APPLICATION NOTES (X23A-G-005-05)