VR4102 datasheet(693/701 Pages) NEC

693 / 701 page

APPENDIX A DIFFERENCES BETWEEN VR4102 AND VR4101

693

A.2.14 Newly Added Units

The VR4102 has three newly designed peripheral units as described below which the VR4101 does not have.

(1) LED

This unit is used to control lighting of an LED. This unit features as below:

• High level width (up to 2 seconds), low level width (up to 8 seconds), and the number of blink can be set

• Supports stop interrupt request

• Enabled during Standby, Suspend, and Hibernate modes

(2) HSP

This unit is used to realize a software MODEM with externally connected CODEC and DAA blocks. The HSP unit

of the VR4102 is compatible with PCT288I produced by PCTel.

The assigned functions of software and each block are as below.

Software: protocol calculation, CODEC control, error correction, and OS interface

HSP unit: serial/parallel conversion of 16-bit data, control of status pins, and FIFO buffer management

CODEC: D/A, A/D conversion and operation clock supply based on MCLK of HSP unit

DAA: interface for CODEC data and telephone circuits

(3) FIR

This unit is used for IrDA communication in high-speed data transfer. Supported transfer rates includes 0.576M,

1.152M, and 4M bps.

VR4102 Datasheet(PDF) 693 Page - NEC