SED1374 Datasheet, PDF (400/420 Pages) Epson Company – SED1374 Embedded Memory Color LCD Controller

Page 10
EPSON Research and Development
Vancouver Design Center
3 TMPR3912/22U and SED1374/75 Interface
3.1 Hardware Connections
The SED1374/75 occupies the TMPR3912/22U’s PC Card slot #1. Therefore, this slot
cannot be used for other devices on the main board. The Generic # 2 bus mode of the
SED1374/75 is used to interface to this PC Card slot #1.
The SED1374/75 is interfaced to the TMPR3912/22U with minimal glue logic. Since the
address bus of the TMPR3912/22U is multiplexed, it is demultiplexed using an advanced
CMOS latch (74ACT373) to obtain the higher address bits needed for the SED1374/75.
The following diagram demonstrates the implementation of the interface.
TMPR3912/22U
RD*
WE*
CARD1CSL*
CARD1CSH*
ENDIAN
ALE
A[12:0]
D[31:24]
D[23:16]
CARD1WAIT*
DCLKOUT
+3.3V
SED1374
IO V_DD, CORE V_DD
RD#
WE10#
Latch
3.3V _{10K pull-up}
Clock divider
/2
Clock divider
/2
3.3V
3.3V
System RESET
or... ^Oscillator
WE1#
BS#
RD/WR#
RESET#
CS#
AB[15:13]
AB[12:0]
DB[7:0]
DB[15:8]
WAIT#
CLKI
BUSCLK
Figure 3-1: SED1374 to TMPR3912/22U Interface
X00A-G-004-01
SDU1374/75-TMPR3912/22U CPU Module
Issue Date: 98/12/23