This product has significantly more GPIO pins than the existing product. Customers complained that RX has many power supply and system pins, so there are not enough GPIO pins for customers to use. This time however, Renesas has cleared this issue. For example, from 144 pins in RX651, there are 22 more GPIO pins in the same package of RX660. If users need more than 130 GPIO pins for RX651, they will have to choose the 176-pin package. The cost will also increase because of the change in package. In the case of the RX660, there are more GPIO pins, so when upgrading a customer's system, the same package can be used for the upgrade since there are more GPIO pins, so there is no cost increase.