GM8775C replacement solution | DSI to LVDS conversion solution chip | CS5518 completely replaces GM8775C

GM8775C is a DSI to dual-channel LVDS transmitter chip. This product mainly realizes the function of converting MIPI DSI to single/dual-channel LVDS. MIPI supports 1/2/3/4 channels to choose from, and supports a maximum rate of 4Gbps. The LVDS clock frequency is up to 154MHz, and the maximum supported video format is FULL HD (1920 x 1200)

CS5518 is a MIPI DSI to LVDS converter chip.

Capstone CS5518 is a MIPI DSI input, LVDS output conversion chip. MIPI DSI supports up to 4 LANs, each channel runs at a maximum speed of 1Gbps. LVDS supports 18-bit or 24-bit pixels, 25Mhz to 154Mhz, and uses VESA or JEIDA format. It can only use a single 1.8v power supply to save cost and optimize board space,

The CS5518 is suitable for multiple market segments and display applications such as handheld devices, motherboards, dual-panel displays and automotive displays.

In summary:

CS5518 can completely replace GM8775C, and can be replaced PIN TO PIN without changing the circuit, and can be directly replaced.

2. The following is a detailed explanation of the parameter differences between CS5518 and GM8775C:

GM8775C Parameters

a) I/0 power supply voltage: 1.8V /3.3V;

b) Core power supply voltage: 1.8V;

c) Support MIPI® D-PHY 1.00.00 and MIPI® DSI 1.02.00.

d) MIPI supports 1/2/3/4 channel optional transmission modes, with a maximum rate of 1Gbps/channel.

e) MIPI receives 18bpp RGB666, 24bpp RGB888, and 16bpp RGB565 packing formats.

f) MIPI supports LPDT transmission (Low-Power Data Transmission) and reverse LPDT transmission.

g) The clock range of LVDS is 25MHz to 154MHz.

h) LVDS output supports single/dual channel mode. When dual channel mode is selected, the output can be configured as 18/24bit, JEIDA/VESA mode; when single channel is selected, each channel can output simultaneously, and the output mode (18/24bit, JEIDA/VESA mode) can be configured separately.

i) The output data channel of LVDS can flexibly adjust the order to facilitate PCB wiring.

j) You can choose to use MIPI clock or external reference clock as the reference frequency of LVDS output, and support automatic calibration function.

k) Supports two chip configuration modes: MIPI command mode configuration and external I2C configuration;

l) GPO can output PWM signal to control the screen backlight.

m) Package: QFN48-pins with e-pad. n) Operating temperature: -40℃~85℃; o) ESD capability: ≥2KV.

CS5518 parameter characteristics:

Embedded oscillator, no external crystal required

Optional external clock input for 20-154MHz

Support SSC generation +/-3% 100~300KHz to reduce EMI

Supports dithering and 6-bit+FRC

Integrate PWM generator with GPIO output PWM to control reverse

Internal Power-On Reset (POR)

MIPI Input

Supports MIPI D-PHY version 1.00.00 and MIPI DSI version 1.02.00

Supports 1 to 4 data channels, 1 clock channel

Dual lane 0 (reverse LP only)

Supports ultra-low power consumption (ultra-low power consumption state)

Supports 18/24/30/36-bit packed pixel format RGB

Supports loosely packed 18-bit pixel format RGB

Support RGB565 16-bit input

The DSI host can access local registers in ESCAPE mode

Support Sync Event/Sync Pulse Mode

Supports all lines to enter low power mode during V-blanking

Support channel/pole switching

Supports continuous clock and/or discontinuous clock

LVDSA output

Supports 18-bit single-port, 18-bit dual-port, 24-bit single-port and 24-bit dual-port LVDS output interfaces.

Support VESA and JEIDA modes

Flexible LVDS output switching

Programmable swing/common mode voltage

Support channel/polarity/bit swapping

In summary: CS5518 and GM8775C are consistent in parameter characteristics and functional characteristics, and the pin definition and package size of CS5518 and GM8775C are the same.

3. The pin distribution and pin definition of CS55518 and GM8775C are as follows:

Figure 3-1 CS5518 pin layout

CS5518 pin definition

The pin assignment and pin definition of GM8775C are as follows:

GM8775C pin assignment

GM8775C pin definition

In summary: CS5518 and GM8775C are completely consistent in pin configuration and pin definition, so CS5518 can replace GM8775C PIN TO PIN in the design of DSI to dual-channel LVDS conversion solution.