User manual SONY VAIO VPC-EB23FM

[. . . ] Printed in, U. S. A. , U. K. , Singapore, and Taiwan. Compaq, Armada, and ROMPaq are registered in the U. S. Microsoft, MS-DOS, Windows, Windows NT, and other names of Microsoft products mentioned herein are trademarks or registered trademarks of Microsoft Corporation. Intel, Pentium, and Celeron are trademarks of Intel Corporation. Imation and SuperDisk are trademarks of Imation Corporation. [. . . ] The system CPU then has control of the ROM interface and "boots" from the ROM. After executing some very basic test routines, the BIOS code copies itself into system DRAM, begins to execute from DRAM, then starts the 8051 clock again. The system does not need to access the ROM again until it loses power to the DRAM. Host CPU ROM nCS ISA Bus AD[7:0] ALE FDC37N97X LATCH FLASH 512 x 8 ADDR[17:8] nKBWR nKBRD nCE Figure 5-7. MSIO Flash ROM Interface Block Diagram Because the SMC FDC37N97X operates at a higher frequency (24 MHz) compared to the previous 951, the Flash ROM access speed needs to be higher. As it is easier to obtain high speed Flash ROMs that operate at +5 volts rather than +3. 3 volts, the Flash ROMs are powered off +5 VCC while the 97X runs off +3 VCC. Super I/O Controller 5-7 Keyboard Scan The MSIO provides logic to support a scanned keyboard matrix, with 16 Scan Out (KSO) lines and 8 Scan Input (KSI) lines, supporting up to 128 (16 × 8) separate keys on the matrix. However, the E500 and V300 only use up to 12 Scan Out lines. Any single KSO line can be driven, or all can be driven simultaneously. If all lines are driven active, then the scan logic can generate an interrupt if any of the KSI lines go active. This allows the keyboard controller to wait for a key press without having to repeatedly poll the entire matrix. PS/2 Serial Mouse/Keyboard Interfaces The MSIO provides two PS/2 channels to support four PS/2-compatible mouse/keyboard interfaces. All four interfaces can operate simultaneously if supported by 8051 firmware. They are used in the Armada E500 and Armada V300 to support the internal pointing stick or touchpad, an external keyboard, and an external mouse. The M2E, which operates at 3. 3 volts, has several special features for notebook operation, including compliance with the Advanced Power Management (APM) 1. 2, Advanced Configuration and Power Interface (ACPI) 1. 0, and PCI Power Management Interface (PPMI) 1. 0. The M2E has multiple power-saving modes (D0, D1, D2, and D3) for power-efficiency when the audio system is both active and idle. Its high-quality docking solution supports an AC link-based digital docking solution with its secondary 20-bit AC link. The CLKRUN# pin support can be used to stop the PCI interface clock. This helps achieve the lowest power consumption in D3 hot mode. 6-2 Audio Subsystem The device supports full DOS game compatibility for both PC motherboard and add-in card solutions through three hardware implementations: PC/PCI, Distributed DMA (DDMA), and Transparent DMA (TDMA). While PC/ PCI and DDMA are industry-standard protocols for legacy support, ESS's TDMA technology implements DOS game compatibility over the standard PCI 2. 1 bus. Features High-Performance PCI Audio Acceleration s s s s s s s s 500-MIPS-equivalent dual-engine PCI audio accelerator 64-Channel wavetable synthesis HRTF 3-D positional audio acceleration MultiStream DirectSound and DirectSound3D acceleration Hardware acceleration for DirectMusic, ActiveMovie, and DirectInput API DVD AC-3 speaker virtualization Enhanced effects (reverb, chorus, flange, treble, bass, and 3D stereo expander) Advanced platform for interactive 3-D gaming, DVD movie playback, and Internet communications Legacy DOS Game Support Full DOS game compatibility through three hardware implementations: PC/PCI, DDMA, and TDMA s TDMA needs no sideband signals and achieves full DOS game compatibility in the standard PCI 2. 1 bus s Serial IRQ support s Flexible Audio I/O Interface 20-bit AC'97 1. 03/2. 00 CODEC interface s I2S Zoomed Video interface s Two-button hardware master volume control s Digital Ready s Windows 98 WDM acceleration Power Management The M2E is a high-performance device with low power consumption. Besides the low power CMOS technology used to process the M2E, various features are designed into the device to provide benefits from popular power-saving techniques. These features and techniques are discussed in this section. CLKRUN Protocol The PCI CLKRUN feature is one of the primary methods of power management on the PCI bus interface of the M2E for the notebook computer. Audio Subsystem 6-3 PCI Power Management Interface (PPMI) The PCI Power Management Interface (PPMI) specification establishes the infrastructure required to let the operating system control the power of PCI functions. This is done by defining a standard PCI interface and operations to manage the power of PCI functions on the bus. The PCI functions can be assigned one of five power management states that result in varying levels of power savings. The five power management states of PCI functions are: D0­full power s D1 and D2­intermediate states s D3 hot­off state; power supply is on s D3 cold­off state; power supply is off s For the operating system to manage the device power states on the PCI bus, the PCI function supports four power management operations: Capabilities reporting s Power status reporting s Setting the power state s System wake-up s The operating system identifies the capabilities of the PCI function by traversing the new capabilities list. [. . . ] This signal is an analog signal whose voltage level indicates temperature and is monitored by the MSIO. There are three temperature levels that are set in the EEPROM. Crossing the first temperature level causes the CPU to enter thermal management. The cooling fan is turned on ("passive-before-active" cooling). [. . . ]