SED1374 Datasheet, PDF (367/420 Pages) Epson Company – SED1374 Embedded Memory Color LCD Controller

Epson Research and Development
Vancouver Design Center
Page 11
3 SED1374 Bus Interface
This section is a summary of the host bus interface modes available on the SED1374 and
offers some detail on the Generic #1 host bus interface used to implement the interface to
the MCF5307.
3.1 Bus Interface Modes
SED1374
Pin Names
AB[15:1]
AB0
DB[15:0]
WE1#
CS#
BCLK
BS#
RD/WR#
RD#
WE0#
WAIT#
RESET#
The SED1374 implements a 16-bit interface to the host microprocessor which may operate
in one of several modes compatible with most of the popular embedded microprocessor
families. Six bus interface modes are supported:
• Hitachi SH-4.
• Hitachi SH-3
• Motorola MC68000 (using Upper Data Strobe/Lower Data Strobe).
• Motorola MC68020/MC68030/MC683xx (using Data Strobe/DSACKx).
• Generic #1 (Chip Select, plus individual Read Enable/Write Enable for each byte).
• Generic #2 (External Chip Select, shared Read/Write Enable for high byte, individual
Read/Write Enable for low byte).
The SED1374 latches CNF[2:0] and BS# to allow selection of the host bus interface on the
rising edge of RESET#. After releasing reset, the bus interface signals assume their selected
configuration. The following table shows the functions of each host bus interface signal.
Table 3-1: Host Bus Interface Pin Mapping
SH-3
SH-4
MC68K #1
MC68K #2
Generic #1
Generic #2
A[15:1]
A0
D[15:0]
WE1#
CSn#
CKIO
BS#
RD/WR#
RD#
WE0#
WAIT#
RESET#
A[15:1]
A0
D[15:0]
WE1#
CSn#
CKIO
BS#
RD/WR#
RD#
WE0#
RDY#
RESET#
A[15:1]
A[15:1]
A[15:1]
A[15:1]
LDS#
A0
A0
A0
D[15:0]
D[31:16]
D[15:0]
D[15:0]
UDS#
DS#
WE1#
BHE#
External Decode External Decode External Decode External Decode
CLK
CLK
BCLK
BCLK
AS#
R/W#
connect to IO V_DD
connect to IO V_DD
DTACK#
AS#
R/W#
SIZ1
SIZ0
DSACK1#
connect to V_SS
RD1#
RD0#
connect to IO V_DD
connect to IO V_DD
RD#
WE0#
WE#
WAIT#
WAIT#
RESET#
RESET#
RESET#
RESET#
Interfacing to the Motorola MCF5307 "ColdFire" Microprocessor
Issue Date: 99/01/05
SED1374
X26A-G-011-02