VR4102 datasheet(32/701 Pages) NEC

32 / 701 page

CHAPTER 1 INTRODUCTION

(11) Keyboard Interface Unit (KIU)

The keyboard interface unit (KIU) has 12 scan lines and 8 detection lines. It can detect when any of 64/80/96

keys are pressed. It supports key rollover for two to three continuous strokes.

(12) Touch Panel Interface Unit (PIU)

The touch panel interface unit (PIU) detects when the touch panel is touched, by controlling the internal A/D

converter.

(13) Debug Serial Interface Unit (DSIU)

The debug serial interface unit (DSIU) is a serial interface for debugging. It supports a maximum transfer rate of

115 kbps.

(14) Serial Interface Unit (SIU)

The serial interface unit (SIU) conforms to the RS-232-C specification and is compatible with 16550. It supports

a maximum transfer rate of 1.15 Mbps. Also available is an IrDA serial interface supporting a maximum transfer

rate of 115 kbps, but this interface and the RS-232-C interface are mutually exclusive.

(15) Fast IrDA Interface Unit (FIR)

The FIR unit is a unit for performing 0.5- to 4-Mbps IrDA communication.

This unit operates based on a

dedicated 48-MHz clock input.

(16) Host Signal Processing Unit (HSP)

The HSP unit is used to realize a software modem. It interfaces the CPU core with an external codec device,

and controls them.

(17) Light Emitting Diode Unit (LED)

The LED unit is used to control the lighting of external LED.

VR4102 Datasheet(PDF) 32 Page - NEC