S1D13700F02 Epson Electronics America, Inc., S1D13700F02 Datasheet - Page 18

• Manufacturer Part Number: S1D13700F02
• Description: Embedded Memory Graphics Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Page 18
5.2.2 LCD Interface
S1D13700F02
X42D-A-001-01
FPDAT[3:0]
FPFRAME
Pin Name
FPSHIFT
(XD[3:0])
FPLINE
(XSCL)
XECL
YSCL
MOD
(WF)
YDIS
(YD)
(LP)
Type Pin #
O
O
O
O
O
O
O
O
18-21
23
24
26
27
29
30
31
In order to provide effective low-power drive for LCD matrixes, the S1D13700F02 can
directly control both the X and Y-drivers using an enable chain.
OB2T
OB2T
OB2T
OB2T
OB2T
OB2T
OB2T
OB2T
Cell
Table 5-3 LCD Interface Pin Descriptions
NIOVDD
NIOVDD
NIOVDD
NIOVDD
NIOVDD
NIOVDD
NIOVDD
NIOVDD
Power
Power On
RESET#/
State
X
X
X
X
X
X
X
L
Revision 1.01
These output pins are the 4-bit X-driver (column drive) data
outputs and must be connected to the inputs of the X-driver
chips.
The falling edge of FPSHIFT latches the data on FPDAT[3:0]
into the input shift registers of the X-drivers. To conserve
power, this clock is stopped between FPLINE and the start of
the following display line.
The falling edge of XECL triggers the enable chain cascade for
the X-drivers. Every 16th clock pulse is output to the next X-
driver.
FPLINE latches the signal in the X-driver shift registers into the
output data latches. FPLINE is a falling edge triggered signal,
and pulses once every display line. FPLINE must be connected
to the Y-driver shift clock on LCD modules.
This output pin is the LCD panel backplane bias signal. The
MOD period is selected using the SYSTEM SET command.
The falling edge of YSCL latches the data on FPFRAME into
the input shift registers of the Y-drivers. YSCL is not used with
driver ICs which use FPLINE as the Y-driver shift clock.
This output pin is the data pulse output for the Y drivers. It is
active during the last line of each frame, and is shifted through
the Y drivers one by one (by YSCL), to scan the display’s
common connections.
This output pin is the power-down output signal. YDIS is high
while the display drive outputs are active. YDIS goes low one or
two frames after the power save command is written to the
S1D13700F02. All Y-driver outputs are forced to an
intermediate level (de-selecting the display segments) to blank
the display. In order to implement power-down operation in the
LCD unit, the LCD power drive supplies must also be disabled
when the display is disabled by YDIS.
Description
Epson Research and Development
Hardware Functional Specification
Vancouver Design Center
Issue Date: 2005/11/29