S1D13505 Epson Electronics America, Inc., S1D13505 Datasheet - Page 443

• Manufacturer Part Number: S1D13505
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
3 S1D13505 Host Bus Interface
3.1 PR31500/PR31700 Host Bus Interface Pin Mapping
Interfacing to the Philips MIPS PR31500/PR31700 Processor
Issue Date: 01/02/05
Note
The S1D13505 implements a 16-bit host bus interface specifically for interfacing to the
PR31500/PR31700 microprocessor.
The PR31500/PR31700 host bus interface is selected by the S1D13505 on the rising edge
of RESET#. After releasing reset, the bus interface signals assume their selected
configuration. For details on S1D13505 configuration, see Section 4.2, “S1D13505 Config-
uration” on page 12.
The following table shows the function of each host bus interface signal.
Table 3-1: PR31500/PR31700 Host Bus Interface Pin Mapping
At reset, the Host Interface Disable bit in the Miscellaneous Disable Register
(REG[1Bh] bit 7) is set to 1. This means that only REG[1Ah] (read-only) and
REG[1Bh] are accessible until a write to REG[1Bh] sets bit 7 to 0 making all regis-
ters accessible. When debugging a new hardware design, this can sometimes give the
appearance that the interface is not working, so it is important to remember to clear this
bit before proceeding with debugging.
S1D13505 Pin Name
AB[16:13]
BUSCLK
DB[15:8]
RD/WR#
RESET#
AB[12:0]
DB[7:0]
WAIT#
WE1#
WE0#
AB20
AB19
AB18
AB17
M/R#
CS#
BS#
RD#
Philips PR31500/PR31700
/CARDxWAIT
/CARDIOWR
/CARDxCSH
/CARDIORD
/CARDxCSL
/CARDREG
DCLKOUT
D[23:16]
D[31:24]
RESET#
A[12:0]
ALE
V
V
V
V
/WE
/RD
DD
DD
DD
DD
X23A-G-001-07
S1D13505
Page 9