EPL09060 datasheet(13/54 Pages) EMC

13 / 54 page

EPL09060

9 COM/60 SEG LCD Driver

Product Specification (V1.0) 12.28.2005

7.1.2 Selecting the Interface Type

The EPL09060 can be operated with serial interface (SPI) and parallel interface (80-

series or 68-series) as selected by P/S pin.

Serial Interface (SPI)

When serial mode (PS = "L"), D6 (SCK) is used as serial clock input pin, D7 (SDI) is

used as serial data input pin, D5 (SDO) is used as serial data output pin. When the

LSI is active (/CS1=”L”, CS2=”H”), serial data input (D7), serial clock input (D6) inputs

and serial data output (D5) are enabled. The 8-bit shift register and 3-bit counter are

reset to the initial condition when the chip is not selected. The data input/output from

SDI/SDO terminal is MSB first as in the order of D7, D6…D0, and is latched at the

rising edge of the serial clock SCK. Serial input data is display data when A0="H"

and instruction when A0="L". The A0 input is read in and identified at the rising edge

of the (8 x n) serial clock pulse. Since the clock signal (D6) is easy to be affected by

the external noise caused by the line length, the operation check on the actual

machine is recommended.

Figure 4 Serial Interface Signal Chart

/WR (R/W)

D7 (SDI)

D5 (SDO)

Instruction Write

Status Read

Invalid

Status Read

Display Data Write

Status Read

Invalid

Display Data Read

SDI

(D7)

SDO

(D5)

SCK

(D6)

/CS1

CS2

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