HP Pavilion 10 TouchSmart 10z-e000 HP Pavilion10 TouchSmart Notebook PC Mainte - Page 76

Non-volatile memory usage Non Volatile Memory Type Real Time Clock (RTC) battery backed-up CMOS configuration memory (CMOS) Controller (NIC) EEPROM Keyboard ROM DIMM Serial Presence Detect (SPD) configuration data System BIOS Intel Management Engine Firmware Amount (Size) 256 Bytes Does this memory store customer data? No Does this memory retain data when power is removed? Yes 64 Kbytes No Yes (not customer accessible) 64 Kbytes No Yes (not customer accessible) 256 Bytes No Yes per memory module, 128 Bytes programma bl e (not customer accessible) 4 to 5 Yes Yes MBytes 1.5 or Yes Yes 5MByte What is the How is data input into purpose of this memory? this memory? How is this memory write protected? Stores system date and time and limited keyboard controller data. Using the F10 Setup utility or changing the Microsoft® Windows® date & time. This memory is not write-protected. HP recommends password protecting the F10 Setup utility. Store NIC configuration and NIC firmware. 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 NIC vendor. Writing data to this ROM in an inappropriate manner will render the NIC nonfunctional. Stores firmware code (keyboard, mouse, & battery management) . Programmed at the factory. Code is updated when the system BIOS is updated. A utility is required for writing data to this memory and is available on the HP website. Writing data to this ROM in an inappropriate manner can render the PC nonfunctional. Stores memory module information. Programmed by the memory vendor. Data cannot be written to this memory when the module is installed in a PC. The specific write protection method varies by memory vendor. Store system BIOS code and PC configuration data. System BIOS code is programmed at the factory. Code is updated when the system BIOS is updated. Configuration data and settings are input using the F10 setup utility or a custom utility. A utility is required for writing data to this memory and is available on the HP website. Writing data to this ROM in an inappropriate manner can render the PC nonfunctional. Stores Management Engine Code, Settings, Management Engine Code is programmed at the factory. Code is updated via Intel secure The Intel chipset is configured to enforce HW protection to block all direct read/ 66 Chapter 10 Statement of Volatility