HP ZBook 15 G5 Base Model Mobile Workstation User Manual download pdf (Page 195)

Nonvolatile memory usage

Nonvolatile

Memory Type Amount (Size)

Does this

memory

store

customer

data?

Does this

memory

retain data

when power

is removed?

What is the

purpose of this

memory?

How is data input into this

memory?

How is this memory

write-protected?

HP Sure Start ash

(select models

only)

8 MBytes No Yes Provides

protected

backup of

critical System

BIOS code, EC

rmware, and

critical

computer

conguration

data for select

platforms that

support HP

Sure Start.

For more

information,

see Using HP

Sure Start

(select models

only)

on page 186.

Data cannot be written to this

device via the host processor.

The content is managed

solely by the HP Sure Start

Embedded Controller.

This memory is protected

by the HP Sure Start

Embedded Controller.

Real Time Clock

(RTC) battery

backed-up CMOS

conguration

memory

256 Bytes No Yes Stores system

date and time

and noncritical

data.

RTC battery backed-up CMOS

is programmed using the

Computer Setup (BIOS), or

changing the Microsoft

Windows date & time.

This memory is not write-

protected.

Controller (NIC)

EEPROM

64 KBytes (not

customer

accessible)

No Yes Stores NIC

conguration

and NIC

rmware.

NIC EEPROM is programmed

using a utility from the NIC

vendor that can be run from

DOS.

A utility is required to

write data to this memory

and is available from the

NIC vendor. Writing data

to this ROM in an

inappropriate manner will

render the NIC non-

functional.

DIMM Serial

Presence Detect

(SPD)

conguration data

256 Bytes per

memory

module, 128

Bytes

programmable

(not customer

accessible)

No Yes Stores memory

module

information.

DIMM SPD is programmed by

the memory vendor.

Data cannot be written to

this memory when the

module is installed in a

computer. The specic

write-protection method

varies by memory vendor.

System BIOS 9 MBytes Yes Yes Stores system

BIOS code and

computer

conguration

data.

System BIOS code is

programmed at the factory.

Code is updated when the

system BIOS is updated.

Conguration data and

settings are input using the

Computer Setup (BIOS) or a

custom utility.

NOTE: Writing data to

this ROM in an

inappropriate manner can

render the computer non-

functional.

A utility is required for

writing data to this

memory and is available

on the HP website; go to

http://www.hp.com/

support. Select Find your

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