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¡ Semiconductor

MSM6794

•LCDCK (LCD Clock)

Input/output pin for display data latch clock. This pin is an output pin if master is specified

and is an input pin if slave is specified. To use two or more MSM6794 devices, connect LCDCK

of the master with LCDCK of the slave.

•FLM (First Line Marker)

Input/output pin for the first line marker. This pin is an output pin if master is specified, and

is an input pin if slave is specified. To use two or more MSM6794 devices, connect FLM of the

master with FLM of the slave.

•DF (Display Frequency)

Input/output pin for LCD alternating frame signals. This pin is an output pin if master is

specified, and an input pin if slave is specified. To use two or more MSM6794 devices, connect

DF of the master with DF of the slave.

•OSC1 (Oscillation 1)

Input pin for RC oscillation. Connecting the specified capacitor and resistor to this pin and the

OSC2 and OSC3 pins creates an RC oscillation circuit. To generate an original oscillation clock

externally, input the original oscillation clock to this pin.

•OSC2, OSC3 (Oscillation 2, Oscillation 3)

Output pins for RC oscillation. Connecting the specified capacitor and resistor to these pins

and the OSC1 pin creates an RC oscillation circuit. To generate an original oscillation clock

externally, leave these pins open.

OSC1

OSC2

OSC3

OSC1

OSC2

OSC3

Open

Open

For RC oscillation circuit

For external clock input

External clock

Oscillation circuit diagram

M/S (Master/Slave)

Input pin for switching between master and slave. Setting this pin to "L" sets this IC to the IC

at the master side. Setting this pin to "H" sets this IC to the IC at the slave side. Do not change

the setting value after power is turned on.

CO (Clock Output)

Output pin for original oscillation clock. The clock in the same phase as OSC1 is output. To

use two or more MSM6794 devices, connect CO of the master with OSC1 of the slave.