UPD720012 Description
DATA SHEET MOS INTEGRATED CIRCUIT µPD72012 HUB CONTROLLER FOR UNIVERSAL SERIAL BUS The µPD72012 is a dedicated LSI for a HUB connected to a universal serial bus (USB) system. It is an upgrade of NEC’s µPD72011. It plies with USB specification revision 1.1.
UPD720012 Key Features
- The user can customize the vendor ID and product ID by using Mask ROM option. { Supports 5 kinds of string descriptors (
- There is an on-chip descriptor and request response sequencer. External initial setup and control is not needed and HUB
- Four or five ports can be selected using a pin function. { Power modes
- Bus power or self-power can be selected using a pin function (an external power control circuit is required). { Correspo
- Two kinds of standard ROM code products are provided. Standard and HUB class descriptors are on-chip in the µPD72012. RO
- 48 MHz oscillator input or a 4 MHz crystal resonator can be supported { Power control
- Port power control and overcurrent detection functions are on-chip. Individual port control or collective control can be