UPD31172 Datasheet | NEC

DATA SHEET MOS INTEGRATED CIRCUIT µPD31172 VRC4172 TM PANION CHIP FOR VR4121 DESCRIPTION The µPD31172 (mercial name: VRC4172) is a panion chip designed for NEC’s µPD30121 microprocessor (mercial name: VR4121). The VRC4172 has the following functions available on chip: a USB host controller, an IEEE1284 parallel controller, a 16550 serial controller, a PS/2 controller, general-purpose ports (GPIO), programmable chip select (PCS), and a PWM controller (a duty modulated light pulse generation function for LCD backlighting). The VRC4172 can be directly connected to the VR4121, allowing a reduction in the man-hours required for development of a Windows™ CE system. Detailed...