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Epson Research and Development
Vancouver Design Center
S1D13505 Interfacing to the Philips MIPS PR31500/PR31700 Processor
X23A-G-001-07 Issue Date: 01/02/05
The host interface control signals of the S1D13505 are asynchronous with respect to the
S1D13505 bus clock. This gives the system designer full flexibility to choose the
appropriate source (or sources) for CLKI and BUSCLK. The choice of whether both clocks
should be the same, whether to use DCLKOUT as clock source, and whether an external or
internal clock divider is needed, should be based on the desired:
• pixel and frame rates.
• power budget.
• part count.
• maximum S1D13506 clock frequencies.
The S1D13505 also has internal CLKI dividers providing additional flexibility.
4.2 S1D13505 Configuration
The S1D13505 latches MD15 through MD0 to allow selection of the bus mode and other
configuration data on the rising edge of RESET#. For details on configuration, refer to the
S1D13505 Hardware Functional Specification, document number X23A-A-001-xx.
The table below shows those configuration settings relevant to the Philips
PR31500/PR31700 host bus interface.
Table 4-1: S1D13505 Configuration for Direct Connection
S1D13505
Pin Name
Value on this pin at rising edge of RESET# is used to configure:
1 (V
DD
)0 (V
SS
)
MD0 8-bit host bus interface
16-bit host bus interface
MD[3:1]
111 = Philips PR31500/PR31700 host bus interface if Alternate host bus interface is selected
MD4
Little Endian Big Endian
MD5 WAIT# is active high (1 = insert wait state)
WAIT# is active low (0 = insert wait state)
MD11
Alternate host bus interface selected Primary host bus interface selected
MD12 BUSCLK input divided by two: use with DCLKOUT BUSCLK input not divided: use with external oscillator
= configuration for Philips PR31500/PR31700 host bus interface