10.4 [I] principle diagram check summary
10.4.1 check all chip packaging figure pin is
For users to draw packaging, be sure to check the direction and identity, especially in chip,

10.4.2 skillfully use schematic diagram, engineering compiling function
Undertake engineering options first set of rules, to repeat a number of components, floating empty network label, as well as single on the network, pin are needed to establish the rules of error checking, when project compilation can be detected by the software, thereby reducing the workload of design personnel,

Examining the function of chip pins 10.4.3 connection is correct, whether the omission
10.4.4 network used for label, to be good at tracking
Use Alt + left mouse button, can be bright show target network, convenient for check out where the network connection is in line with the designers think

10.4.5 for errors produced by the compiler, artificial judgement can be ignored for No ERC to prevent
Cancel some unnecessary error display, can help the designers to find faster the remaining error point

10.4.6 check all external capacitance, resistance and inductance values are according to the
10.4.7 check whether all the supply chips added a filter capacitor
10.4.8 all inspection system interface circuit
Input and output interface circuit generally includes system, need to check whether there is the corresponding input protection, output drive ability, whether there is enough
Input protection generally have: recoil current protection, optical coupling isolation, overvoltage protection
Output driver incompetent pull up resistors can add some improve the driving ability

10.4.9 check each chip for electricity, reset the order, if requested, you also need to design the corresponding delay circuit
Can pass a time delay chip processing, can also pass a triode, using the clamping voltage, in turn to the main chip in the

10.4.10 check each chip and digital and analog ground is isolated from
General analog signal processing chip has: sensor chip, analog signal acquisition chip, AD conversion chip, power amplifier chip, filter chip, carrier chip, DA conversion chip, analog signal output chip, etc., often only when the system exists in the analog signal processing chip or circuit will involve analog ground and digital ground,
General chip grounding pin the connection digital or analog, manual will be how, according to the datasheet for details on connection

10.4.11 (optimization), observe the modules if there is a better solution