ST7787 datasheet(22/217 Pages) SITRONIX

22 / 217 page

ST7787

V1.7

2008.04.18

6. Pin description

6.1 Power supply pin

Name

I/O

Description

Count

Connect pin

VDD

Power supply for analog, digital system and booster circuit

VDD

VDDI

Power supply for I/O system

VDDI

VPP

Power supply for OTP circuit

VPP

AGND

System ground for analog system and booster circuit

GND

DGND

System ground for I/O system and internal digital system

GND

6.2 Interface logic pin

Name

I/O

Description

Count

Connect pin

P68

-8080/6800 MCU interface mode select

-P68=’1’, select 6800 MCU parallel interface

-P68=’0’, select 8080 MCU parallel interface

-If not used, please fix this pin at VDDI or DGND level

GND/VDDI

IM0~IM2

-Selection for MCU parallel interface or serial interface

-If not used, please connect this pin to VDDI or DGND

IM2

MCU & SPI interface mode selection

SPI interface

MCU parallel interface

GND/VDDI

RESX

-This signal will reset the device and it must be applied to properly

initialize the chip

-Signal is active low

MCU

CSX

-Chip select input pin (“Low” is enable)

-This pin can be permanently fixed “Low” in MCU interface mode only

MCU

D/CX

(SCL)

-Display data/command selection pin in MCU interface

-D/CX=’1’: display data

-D/CX=’0’: command data

-In serial interface, this is used as SCL

-If not used, please connect this pin to VDDI or DGND

MCU

RDX

(E)

-Read enable in 8080 MCU parallel interface

-Read/write operation enable pin in 6800 MCU parallel interface

-If not used, please connect this pin to VDDI or DGND

MCU

WRX

-Write enable in MCU parallel interface

- Read/write operation enable pin in 8080 MCU parallel interface

-If not used, please connect this pin to VDDI or DGND

-In RGB interface, WRX are not used and should be connected to

VDDI

MCU

SDA

-When RCM1, RCM0=’1X’ (RGB interface), this pin is used as serial

input/output pin.

-When RCM1, RCM0=’0X’ (MCU interface), this pin is not used and

please connect to VDDI or DGND level. The serial input/output pin in

MCU interface mode is D0.

MCU

DGND/VDDI

OSC

-Monitoring pin of internal oscillator clock and is turned ON/OFF by S/W

command

-When this pin is inactive (function OFF), this pin is DGND level

-If not used, please keep this pin open

D[17:0]

I/O

-When RCM=”1” (RGB interface), D[17:0] are used as RGB interface

data bus

-When RCM=”0” (MCU interface), D[17:0] are used as MCU parallel

interface data bus

-D0 is the serial input/output signal in serial interface mode

-In serial interface, D[17:1] are not used and should be connected

to VDDI or DGND

MCU

I/O

-Tearing effect output pin to synchronies MCU to frame writing,

activated by S/W command

-External VSYNC signal input pin with MCU interface.

-When this pin is not inactive, this pin is low

-If not used, please open this pin

MCU

PCLK

-Pixel clock signal in RGB interface mode

-If not used, please fix this pin at VDDI or DGND

RGB interface

-Vertical sync. Signal in RGB interface mode

-If not used, please fix this pin at VDDI or DGND

RGB interface

-Horizontal sync. Signal in RGB interface mode

-If not used, please fix this pin at VDDI or DGND

RGB interface

-Data enable signal in RGB interface mode

RGB interface

ST7787 Datasheet(PDF) 22 Page - Sitronix Technology Co., Ltd.

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