1.2 System Unit 1 Hardware Overview
Tecra A3/S2 Series Maintenance Manual 1-11
• High Speed 16C550A Compatible UARTs with Send/Receive 16-Byte FIFO
• Supports 230k and 460k Baud
• Programmable Baud Rate Generator
• Modem Control Circuitry
Infrared Communications Controller
• IrDA v1.2 (4Mbps), HPSIR, ASKIR, Consumer IR Support
• 1 IR Ports
• 96 Base I/O Address, 15 IRQ Options and 3 DMA Options
Multi-Mode Parallel Port with ChiProtect
• Standard Mode IBM PC/XT, PC/AT,
• PS/2 Compatible Bidirectional Parallel Port
• Enhanced Parallel Port (EPP)
Compatible – EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant)
• IEEE 1284 Compliant Enhanced Capabilities Port (ECP)
• ChiProtect Circuitry for Protection Against Damage Due to Printer Power-On
• 192 Base I/O Address, 15 IRQ and 3 DMA Options
LPC Bus Host Interface
• Multiplexed Command, Address and Data Bus
• 8-Bit I/O Transfers
• 8-Bit DMA Transfers
• 16-Bit Address Qualification
• Serial IRQ Interface Compatible with Serialized Serial IRQ Interface Compatible
with Serialized IRQ Support for PCI Systems
• PCI CLKRUN# Support
• Power Management Event(IO_PME #)Interface Pin
Keyboard controller
• KB910L is use as keyboard controller and battery management unit
Audio subsystem
Realtek ALC250VD for AC97 codec
• Support of S’PDIF out is fully compliant with AC97 rev2.3 specification.
• 20-bit Stereo Digital-to-Analog Converters.
• 18-bit Stereo Analog-to-Digital Converters.
• Built-in 7 Bands of Digital Hardware Equalizer for Optimizing Speaker Response.
• Supports double sampling (96KHz) of DVD audio playback.
• Two Analog Line-level Stereo Inputs with LIN_IN, CD, and AUX.
• Two Analog Line-level Mono Inputs : PCBEEP, PHONE-IN.
• Two software selectable Microphone Inputs.
• High quality differential CD Input.
• Power Management and enhanced power saving features.
• Meets Microsoft® WHQL/WLP2.0 audio Requirements.