SC6600L7 chip integrates three-card engine processor and controller; The periphery of the chip is integrated with a SIM interface and connected with three SIM cards; Chip communication protocol stack realizes the firmware of three-card communication protocol on DSP. In terms of software, the three-card-and-three-standby software adopts the Mocor platform of the mobile phone with Spreadtrum function, which ensures the stability, inheritance and openness of the software version. All interfaces and applications related to these three cards have been added to the GUI. Chen Jiefeng said, "SC6600L7 three-card three-standby mobile phone scheme inherits all the performance characteristics of Spreadtrum SC6600L2, and also adds multi-card processor and controller module; At the same time, it also has rich peripheral interfaces and full-featured third-party hardware expansion capabilities. " In addition, Spreadtrum also provides customers with the optimal design scheme of card holder and how to design three SIM card holders +T cards by using the width and length of PCB. As for power consumption, Chen Jiefeng said, "The power consumption will be a little higher than dual card dual standby. Take the single card and single standby mobile card as an example. The power consumption of the dual card and dual standby platform is 1.99mA, and the power consumption of the three card and three standby platforms is 2.00mA；: In the case of multi-card and multi-standby (mobile+mobile), the power consumption of dual-card and dual-standby platform is 3.39mA, and that of three-card and three-standby platform is 4.89mA；; In the case of multi-card multi-standby (mobile+Unicom), the power consumption of the dual-card standby platform is 3.80mA, while the power consumption of the three-card three-standby platform is 5.40 Ma " He went on to explain, "However, there is almost no difference in power consumption between the two platforms when talking and playing multimedia functions."

However, according to Sun Hongjun, CEO of Shanghai Ivy Electronics, who produces SIM card controllers, at present, SC6600L7 supports three cards and three standby, and the periphery needs a SIM card interface controller. "Judah's three-card, three-standby mobile phones all use our AW6302 dual-card dual-standby driver chip. This project was secretly developed several months ago, and Ivy has been actively cooperating with Spreadtrum to debug related circuits. Now that the news is officially released, we don't have to keep this secret in frustration. " He said excitedly, "The cumulative shipment of AW6302 has reached 240 million pieces, and the ESD capability of HBM ESD as high as 8KV, and it has entered many platforms such as MTK, Spreadtrum, Qualcomm, Infineon and Lian Xin. Now Spreadtrum has launched a three-card, three-standby scheme, and AW6302 is expected to blossom and be reborn. "