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Pin Number
40
41
42
43
44
45
46
47
39
48
49
50
51
52
205
1
208
207
206
4
204
f) Panel Power Sequencing ( PPWR, PBIAS) ( Pin 113~114)
The gm2120 has two dedicated outputs PPWR and PBIAS ( Pin113 and Pin114) to control LCD power
sequencing once data and control signals are stable.
g) Parallel ROM Interface Port (Pin 8~25, Pin28~35)
The gm2120 has parallel ROM interface port , pin8~25 for address bus, pin28~35 for data bus.
h) Panel interface (Pin 55~66, Pin69~80, Pin83~87, Pin90~96.Pin99~110)
The gm2120 driver interface is highly programmable. It supports dual bus / dual port for SXGA drivers.
1.2 LVDS Transmitter DS90FC383 (U1,U2)
The DS90FC383 transmitter converts 28 bits of TTL data into four LVDS ( Low Voltage Differential
Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams
over a fifth LVDS link. At a transmit clock frequency of 85 MHz, 24 bits of RGB data and 3 bits of LCD
timing and control data ( FPLINE, FPFRAME, DRDY) are transmitted at rate of 595 Mbps per LVDS
data channel. U1 AS the ODD pixel transmitter , U2 as the EVEN pixel transmitter.
AL718
Pin Name
GPIO0 / PWM0
GPIO1 / PWM1
GPIO2 / PWM2
GPIO3 / TIMER
GPIO4 / UART_DI
GPIO5 / UART_DO
GPIO6
GPIO7
GPIO8 / IRQINn
GPIO9
GPIO10
GPIO11
GPIO12
GPIO13
GPIO16 / HFSn
GPIO17
GPIO18
GPIO19
GPIO20
GPIO21 / IRQn
GPIO22 / HCLK
Pin Usage
Backlight control
Volume control
Key-Left
No use
Debug Purpose
Debug Purpose
Key-Right
No use
LED-Orange
Key-Sel
Key-Menu
No use
NV- RAM (U4) SDA
NV- RAM (U4) SCL
NV- RAM (U11) SCL
No use
No use
Key-Power, on / off control
Mute , audio disable
LED-Green
NV- RAM (U11) SDA
4-2
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