Raspberry Pi 4th generation clock board electrical parameters:
External 10MHz reference clock signal or install 25X25X13 package 5V/10MHz constant temperature crystal oscillator
Input instructions: 1. The external 10MHz reference clock signal is only used when the 0CX0 constant temperature crystal oscillator is not installed
2. The input level cannot exceed 5V
2.25MHz/3.3V 2 way
Power supply voltage: DC stabilized voltage +6V to +9V (power supply exceeding 9V is not recommended)
Suggested power supply current: ≥1000MA (including WV85 constant temperature crystal oscillator reference current)
(This power supply interface only supplies power to the clock board, not to the Raspberry Pi)
Raspberry Pi 4th Generation Clock Board Introduction
1. The Raspberry Pi motherboard uses a low-precision passive crystal oscillator as the clock signal source, and the quality of the clock signal
Low, the constant temperature crystal oscillator clock signal has high precision and high stability. The upgraded clock effectively improves the quality of the bus clock. After the upgrade, the sound is extended and strengthened at both ends, transparent and clean, and the details are clear.
2. Use a 10MHz constant temperature crystal oscillator as a reference clock signal, and all output frequency points are synchronized and output from the same source.
3. One crystal signal source per board, 3 outputs, can upgrade 3 on the Raspberry Pi 4th generation motherboard at the same time
The crystal oscillator reduces the crosstalk between using multiple different crystal oscillators at different frequencies.
4. Use the low-noise voltage regulator chip TPS7A4700 to provide regulated power supply for the 0CⅪ0 constant temperature crystal oscillator.
5. The core clock processing chip is second-level regulated power supply.
6. Use G-level radio frequency dedicated 50 ohm cable to effectively ensure the signal transmission quality,
Use ipex1 generation seat to facilitate players to disassemble and assemble.
7. This product is specially designed for Raspberry Pi 4th generation motherboards, only suitable for Raspberry Pi 4th generation motherboards, if needed
For other versions or output frequencies, please contact the seller before placing an order.
1. Please read the product description and usage requirements in detail before shooting, which will help you to use the business correctly
Products and products are tested before shipment. If you have too many questions or puzzles, don’t rush to take photos.
Learn about it on your own, and make a clear understanding of the product functions and related basic knowledge before you buy.
2. The Raspberry Pi upgrade clock involves the removal of the crystal oscillator on the Raspberry Pi motherboard and the welding information in the corresponding position.
No. leads, the operating space is very small, and the solder joints are very small, requiring buyers to have high hands-on ability
The success of the upgrade also depends on the buyer’s hands-on ability, so we only guarantee
As for the output parameters described above, as to whether the upgrade is successful or the clock board is caused during the upgrade process,
The risk of damage to the Raspberry Pi motherboard or other components is borne by the buyer.
Customer service, there is no time and energy to guide buyers online, nor provide modification services
Raspberry Pi 4th generation crystal oscillator upgrade and modification instructions
Use a hot air gun to remove the 3 crystal oscillators on the Raspberry Pi motherboard, and clean the pads. The clock signal leads are connected to the crystal oscillator signal input and ground pads as shown below.
Tips: The Raspberry Pi motherboard uses ultra-high temperature solder, and the hot air gun uses a thin mouthpiece with a diameter of not more than 5MM, and adjusts the temperature to about 390 degrees, and blows against the crystal that needs to be removed until it can be gently removed with Nie Zi So far, usually blow for about 2 minutes to take off
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