UPD31172 circuit equivalent, mos integrated circuit.
* Directly connectable to VR4121
* On-chip USB host controller
* USB ports: 2
* Compliant with the USB OpenHCI specifications, release 1.0
* Communica.
* Battery-driven portable information devices
* Peripheral devices for PCs, etc.
The information in this docume.
The µPD31172 (commercial name: VRC4172) is a companion chip designed for NEC’s µPD30121 microprocessor (commercial name: VR4121). The VRC4172 has the following functions available on chip: a USB host controller, an IEEE1284 parallel controller, a 165.
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