PCB News - The tablet design plan is summarized in the PCB design

The tablet design plan is summarized in the PCB design

1) ARM9 core representative program:

1. VIA WM8505/WM8505+

VIA WM8505/WM8505+ is one of the cheapest Android solutions, with Android 1.6 system. The program only supports JPEG hard decoding, no 3D acceleration technology. As an overclocked version of WM8505, WM8505+ generates more heat. The video capabilities of these two programs are very weak and cannot be used as MP4. The high-definition capabilities are even more predictable.

Computing performance ★☆☆☆☆☆☆☆☆☆

HD ability ★★☆☆☆☆☆☆☆☆

Recommendation index ★☆☆☆☆☆☆☆☆☆

2. Rockchip RK2808

Rockchip RK2808 is one of the earlier chip solutions on the market. The 600MHz ARM9 core performance is weak, but Rockchip has done a good job in system optimization. The Android 1.5 system is relatively stable and smooth, which is a problem for ordinary web browsing. Not big, but when you encounter a web page with a little more pictures, there will be a sense of blockage during the dragging process.

Rockchip RK2808 uses SDRAM memory, which is worse than DDR2 memory. In addition, its feature of supporting up to 128MB RAM also determines that it is difficult to support systems above Android 2.0. In addition, the lack of 3D acceleration technology is also destined to be missed with dynamic desktops and gorgeous special effects above Android 2.1, and cannot run those that require 3D acceleration technology. game.

Computing performance ★★☆☆☆☆☆☆☆☆

HD ability ★★★★★☆☆☆☆☆

Recommendation index ★★☆☆☆☆☆☆☆☆

3. Rockchip RK2818

Rockchip RK2818 has improved the memory controller and supports DDR2 particles, so the performance will be improved to a certain extent. In addition, the memory capacity has increased significantly. Therefore, Rockchip RK2818 has obvious performance in system response, web browsing and document reading. promote.

Rockchip RK2818 has passed Adobe's PDF certification. When using the built-in reader to read PDF files, the speed is very fast, but the function is slightly monotonous. In addition, RK2818's DSP has programmability. After further development, it can support 3D video, face recognition and other functions, with increased highlights.

Although Rockchip RK2818 has not been significantly improved in terms of video and games, due to the expansion of memory capacity, it has made considerable progress compared to RK2808 in the experience of surfing the Internet and reading.

Theoretical 3D performance test:

Triangle productivity: 1M

Pixel fill rate: 100M

Computing performance☆☆☆☆☆☆☆

HD ability ★★★★★★☆☆☆☆

Recommendation index ★★★☆☆☆☆☆☆☆

(2)ARM11 core representative program:

1. Telechips TCC8902

Telechips TCC8902 supports Android 2.1 system, the performance is at the mainstream level, and can cope with most applications. Although TCC8902 has 3D acceleration technology, it has not been able to bring out the strength of "ARM Mali-200" due to insufficient drive. Video playback is the strength of TCC8902. TCC8902 supports multi-format 1080P, and it also truly achieves smooth playback at 1080p. It is worth mentioning that "multi-format 1080P" not all 1080P can be played. According to the author's use, some 1080P videos still have delays or even freezes, but for 720P, it is almost easy, compared to the above several Solution, the video capability of TCC8902 is already very good. When browsing web pages, the processing power of ARM11 is still not enough for complex web pages with pictures, and dragging is not smooth. Generally speaking, Telechips TCC8902 is one of the better solutions at this stage.

Theoretical 3D performance test:

Triangle productivity: 16M

Pixel fill rate: 275M

Computing performance☆☆☆☆☆☆

HD ability ★★★★★★★★☆☆

Recommendation index ★★★☆☆☆☆☆☆☆

2. Infront Micro IMAPX200

Infront Micro's IMAPX200 solution uses ARM11 core, based on 65nm manufacturing process, and the frequency reaches 1GHz. With 256MB DDR2 memory. The program supports Android 2.1 system.

Video performance: Infront Micro IMAPX200 has an independent On2 Hantro 8190 video subsystem. The system is based on hard decoding and can support RV, H.264, VC-1, H.263, MPEG4, VP6 and other video formats, up to 1080P.

3D performance: Infront Micro IMAPX200 has a "VIVANTE GC600" 3D accelerated renderer, which adopts a unified IMR rendering architecture and supports OPENGL ES2.0/1.1 and OPENVG.

Theoretical 3D performance test:

Triangle productivity: 19M

Pixel fill rate: 375M

Computing performance☆☆☆☆☆

HD ability ★★★★★★★★☆☆

Recommendation index ★★★☆☆☆☆☆☆☆

(3) Cortex-A8 core representative solution:

1. Texas Instruments OMAP3430/3530

Texas Instruments OMAP3430/3530 is also a classic processor chip, which can reach the level of 1GHz Snapdragon QSD8250 (TI official test score) when OMAP3430 is overclocked to 800MHz. However, it consumes more power than Snapdragon at the same frequency. The power consumption of the Scorpion core of the 1GHz Snapdragon is close to that of the 600MHz TI Cortex-A8. Generally speaking, each has its own strengths and weaknesses.

Theoretical 3D performance test:

Triangle productivity: 14M

Pixel fill rate: 190M

Computing performance☆☆☆☆☆

HD ability ★★★★☆☆☆☆☆☆

Recommendation index ★★★★☆☆☆☆☆☆

2. Texas Instruments OMAP3630/3640

Texas Instruments OMAP3630/3640 adopts a 45nm production process, the frequency has been greatly improved, and the performance is further enhanced. Due to the use of brand-new DDR2 memory, its 3D performance is also fully released, and the theoretical performance has reached twice that of the previous OMAP3430.

Theoretical 3D performance test:

Triangle productivity: 14M

Pixel fill rate: 280M

Computing performance ★★★★★★★★☆☆

HD ability ★★★★★☆☆☆☆☆

Recommendation index ★★★★☆☆☆☆☆☆

3. Freescale i.MX515

Freescale i.MX515 is one of the most popular chips recently. It uses the Cortex-A8 core and has similar performance to Qualcomm's Snapdragon. Daily applications such as web browsing and document reading are natural. Due to the use of DDR2 memory, greater bandwidth has been obtained, and 3D performance has been further improved. In terms of video, RM and RMVB formats can only be achieved through soft decoding, but the multi-format 720P decoding capability is still worth looking forward to.

Theoretical 3D performance test:

Triangle productivity: 27M

Pixel fill rate: 166M

Computing performance ★★★★★★☆☆☆☆

HD ability ★★★★★★☆☆☆☆

Recommendation index ★★★★☆☆☆☆☆☆

(4) Qualcomm Scorpion core representative program:

1. Qualcomm Snapdragon QSD8250

Qualcomm's Snapdragon QSD8250 is one of the first 1GHz chips to come out. The performance is relatively strong, the system is very smooth, and applications such as browsing the web are completely unquestioned. The Adreno 200 integrated with the chip is not very powerful, but it performs well in gaming. In terms of video, Qualcomm Snapdragon QSD8250 is not very good, supporting up to 720P, but it can only guarantee 480P smoothness, but when encountering high bitrate clips, there will still be frame drops or even freezes. In addition, Qualcomm's chips are in their own hands, and the patent fees are more expensive, so the price of products using this solution is not cheap.

Theoretical 3D performance test:

Triangle productivity: 22M

Pixel fill rate: 133M

Computing performance ★★★★★★☆☆☆☆

HD ability ★★★★☆☆☆☆☆☆

Recommendation index ★★★★☆☆☆☆☆☆

(5) Samsung Hummingbird core representative program:

1. Apple A4

The core layout of Apple A4 and Samsung S5PC110 is basically similar, but Apple has optimized and customized the A4 to a great extent (this is the $1 billion research and development cost that Apple said at the time), and abandoned the modules that are not needed for iphone4 or iPad., And increased the secondary cache to improve performance.

In terms of video, Apple A4 changed the VXD370, which is responsible for video hard decoding, to VXD375, which can only support 720P H.264 MP4 format decoding through soft decoding. In terms of 3D performance, Samsung S5PC110's PowerVR SGX540 was changed to SGX535, and the 3D performance was slightly reduced. In addition, Apple A4 is equipped with a 640KB L2 cache, which is an improvement compared to Samsung S5PC110.

Computing performance ★★★★★★★★☆☆

HD ability ★★★★★☆☆☆☆☆

Recommendation index ★★★★★★☆☆☆☆

2. Samsung S5PC110/S5PV210

The difference between Samsung S5PV210 and S5PC110 lies in its packaging method, and there is not much change in nature. The former has a larger package size and is suitable for tablets and netbooks, while the smaller package size of the latter is suitable for mobile phones.

Samsung S5PC110/S5PV210 can be said to be one of the strongest ARMv7 architecture chips at present. It is equipped with 512K L2 cache, which is twice that of other Cortex-A8 processors. It also incorporates a powerful SGX540 display core, and its measured performance is ahead of other Cortex. -A8 product is more than doubled, and the game performance is very strong.

Theoretical 3D performance test:

Triangle productivity: 90M

Pixel fill rate: 1000M

Computing performance ★★★★★★★★☆☆

HD ability ★★★★★★★☆☆☆

Recommendation index ★★★★★☆☆☆☆☆

(6) Cortex A9 core representative program:

1. NVidia Tegra2

NVidia Tegra2 uses Cortex-A9 dual-core, almost twice the performance of Cortex-A8, there is basically no problem facing any Android application. In addition, Tegra2 integrates a dedicated audio decoding module to maximize the release of ARM and reduce power consumption. A built-in ARM7 is used for the power management of the whole chip.

On the whole, NVidia Tegra2 should be the king of the "SOC" in the tablet computer industry today.

Computing performance ★★★★★★★★★★

HD ability ★★★★★★★★★☆

Recommendation index ★★★★★★★☆☆☆

The above is an introduction to the summary of tablet computer design plans. Ipcb is also provided to PCB manufacturers and PCB manufacturing technology.