
Epson Research and Development
Page 13
Vancouver Design Center
Interfacing to the PC Card Bus
S1D13706
Issue Date: 01/02/23
X31B-G-005-02
4.2 S1D13706 Hardware Configuration
The S1D13706 uses CNF7 through CNF0 to allow selection of the bus mode and other
configuration data on the rising edge of RESET#. For details on configuration, refer to the
S1D13706 Hardware Functional Specification, document number X31B-A-001-xx.
The following table shows the configuration required for this implementation of a
S1D13706 to PC Card bus interface.
Table 4-2: CLKI to BCLK Divide Selection
4.3 Register/Memory Mapping
The S1D13706 is a memory mapped device. The S1D13706 uses two 128K byte blocks
which are selected using A17 from the PC Card bus (A17 is connected to the S1D13706
M/R# pin). The internal registers occupy the first 128K byte block and the 80K byte display
buffer occupies the second 128K byte block.
The PC Card socket provides 64M bytes of memory address space. However, the
S1D13706 only needs a 256K byte block of memory to accommodate its 80K byte display
buffer and register set. For this reason, only address bits A[17:0] are used while A[25:17]
are ignored. The S1D13706’s memory and registers are aliased every 256K bytes for a total
of 256 times in the 64M byte PC Card memory address space.
Note
If aliasing is not desirable, the upper addresses must be fully decoded.
Table 4-1: Summary of Power-On/Reset Configuration Options
S1D13706
Pin Name
value on this pin at the rising edge of RESET# is used to configure: (1/0)
1
0
CNF[2:0]
100 = Generic #2 Host Bus Interface
CNF3
GPIO pins as inputs at power on
GPIO pins as HR-TFT / D-TFT outputs
CNF4
Big Endian bus interface
Little Endian bus interface
CNF5
Active high WAIT#
Active low WAIT#
CNF[7:6]
see Table 4-2: “CLKI to BCLK Divide Selection” for recommended setting
= configuration for PC Card Bus
CNF7
CNF6
CLKI to BCLK Divide
0
0
1:1
0
1
2:1
1
0
3:1
1
1
4:1
= recommended setting for PC Card Bus