VR4102 datasheet(66/701 Pages) NEC

66 / 701 page

CHAPTER 2 PIN FUNCTIONS

2.2.4 Initialization Interface Signals

These signals are used when an external agent initializes the processor operation parameters.

Table 2-4

describes the functions of these signals.

Table 2-4 Initialization Interface Signals

Signal

I/O

Description of function

MPOWER

This signal is used to turn on the main power source. The VR4102 asserts the signal at this pin to turn

on the power source for the external DC/DC converter.

POWERON

This signal indicates when the VR4102 is ready to operate. It becomes active when a power-on factor is

detected and becomes inactive when the BATTINH/BATTINT# signal check operation is completed.

POWER

This signal indicates that the POWER ON switch has been pressed. When the POWER ON switch has

been pressed, an external agent must assert the signal at this pin.

RSTSW#

This signal indicates that the RESET switch has been pressed. When the RESET switch has been

pressed, an external agent must assert the signal at this pin.

RTCRST#

This signal resets the RTC. When power is first supplied to a device, the external agent must assert the

signal at this pin for about 600 ms.

VR4102 Datasheet(PDF) 66 Page - NEC