ST7669 datasheet(17/216 Pages) SITRONIX

17 / 216 page

ST7669

Ver 1.3a

17/216

3/2/2009

RW_WR

Read / Write execution control pin. (This pin is only used in parallel interface)

MPU type

RW_WR

Description

6800-series

Read / Write control input pin

RW = “H” : read

RW = “L” : write

8080-series

/WR

Write enable clock input pin

The data on D0 to D17 are latched at the

rising edge of the /WR signal.

When in the serial interface, connect it to VDD.

E_RD

Read / Write execution control pin. (This pin is only used in parallel interface)

MPU Type

E_RD

Description

6800-series

Read / Write control input pin

RW = “H”: When E is “H”, D0 to D17 are in an output.

RW = “L”: The data on D0 to D17 are latched at the

falling edge of the E signal.

8080-series

/RD

Read enable clock input pin

When /RD is “L”, D0 to D17 are in an output status.

When in the serial interface, connect it to VDD.

D17 to D0

I/O

They connect to the standard 8-bit or 16 bit MPU bus via the 8/16/18 –bit bi-directional bus.

When the following interface is selected and /CS pin is high, following pins become high

impedance.

In 8-bit parallel: D17-D8 pins are in the state of high impedance should connect to VDD.

In 3-line/4-line interface D0 pad will be used for SI function

In 4-line interface D1 pad will be used for A0 function

In Serial interface: The unused pins are in the state of high impedance should connect to

VDD.

SI is used to input serial data when the serial interface is selected.(3 line and 4 line)

In ST7669, D0 is the SI when select serial interface. See Table 7.1.1

SCL

SCL is used to input serial clock when the serial interface is selected.

The data is converted in the rising edge. (3 line and 4 line)

In ST7669, RS is the SCL when select serial interface.See Table 7.1.1

Tearing effect output.

/EXT

OTP burn-in control Pin

There is a pull-high resistor between /EXT & VDD in ST7669.

When burning OTP, please add an external VSS on /EXT. (needs external power supply

voltage VPP=7.5V~7.75V)

NOTE：

：

1. In any status the control bus and data bus can not floating.

2. The no used pin should connect to VDD (Supply Digital Voltage).

ST7669 Datasheet(PDF) 17 Page - Sitronix Technology Co., Ltd.

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