S1D13704 Epson Electronics America, Inc., S1D13704 Datasheet - Page 400

• Manufacturer Part Number: S1D13704
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Page 14
4.3 PAL Equations
PAL
OE
WE
CE1
CE2
REG
PCRESET
RESET
WE0
WE1
RD
RDWR
CS
equations
!WE0 = !WE & !CE1 & REG;
!WE1 = !WE & !CE2 & REG;
!CS = REG & (!RD # !RDWR # !WE0 # !WE1);
!RD = !OE & !CE1 & REG;
!RDWR = !OE & !CE2 & REG;
!RESET = PCRESET;
4.4 Register/Memory Mapping
S1D13704
X26A-G-009-03
device
‘16L8’;
Note
The PAL equations
The S1D13704 is a memory mapped device. The S1D13704 memory may be addressed
starting at 0000h, or on consecutive 64K byte blocks, and its internal registers are located
in the upper 32 bytes of the 64K byte block (i.e. REG[0] = FFE0h).
While the PC Card socket provides 64M bytes of address space, the S1D13704 only needs
a 64K byte block of memory to accommodate its 40K byte display buffer and its 32 byte
register set. For this reason only address bits A[15:0] are used while A[25:16] are ignored.
Because the entire 64M bytes of memory is available, the S1D13704’s memory and
registers will be aliased every 64K bytes for a total of 1024 times.
If aliasing is not desirable, the upper addresses must be fully decoded.
for the implementation presented in this document are as follows.
PIN
PIN
PIN
PIN
PIN
PIN
PIN
PIN
PIN
PIN
PIN
PIN
14;
15;
16;
17;
18;
19;
1;
2;
3;
4;
5;
6;
Epson Research and Development
Interfacing to the PC Card Bus
Vancouver Design Center
Issue Date: 01/02/12