Pcmcia Controller And Sockets; Hard Disk Subsystem - NEC Versa 550 Series Service Manual

3-10 Hardware Functional Overview

PCMCIA CONTROLLER AND SOCKETS

The PCMCIA controller is implemented on the Motherboard using UMC's UM8365F and
UM8366F PCMCIA Interface Controller. The UM8365F is an Intel EXCA compatible im-
plementation of ISA bus to PCMCIA 2.0/JEIDA 4.1 Interface controller. It supports two
independent 68 pins PC card sockets and is register compatible with Intel's 82365SL. The
UM8366F is the buffer chip designed to work with the UM8365F as well as for Intel's
82365SL. It provides Data Buffer and Address Buffer for PCMCIA socket interfaces for
two sockets applications.
The NEC Versa 550 Series notebook incorporates PCMCIA double deck slots that sup-
ports insertion of two Type I or II cards at the same time or one Type III card on the upper
slot and one Type I or II card on the bottom slot.
Feature summary of the UM8365F:
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PCMCIA 2.0/JEIDA 4.1 compatible Interface
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Cascadable up to eight sockets in the two sockets mode
n
8/16 Bit ISA interface
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Power Management Function that includes Individual Socket power control, Hot
insertion/removal, Hardware/Software controlled power down, Modem Ring in
Resume, CS Controlled Power Down, and Power Saving with Windows inactivity
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Intel EXCA register compatible
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Supports PCMCIA_ATA Specifications
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Supports Pulse mode interrupt for I/O card
n
Supports two independent IC card sockets (no external buffers needed)
n
Selectable Interrupt Steering from PC card to System Bus

HARD DISK SUBSYSTEM

The hard disk subsystem, implemented on the Motherboard and on the associated built-in
hard disk drive, provides disk storage for all system software and user files.
The NEC Versa 550 Series notebook is equipped with high capacity hard disk drive ranging
from 350MB to 1.2GB using IDE controller with LBA (Logical Block Addressing) mode
support. The I/O subsystem controller, UMC 82C863F, provides the IDE controller for the
hard disk.
The built-in hard drive can support any industry standard 2.5-inch IDE hard disk drive at
19mm or 17mm height. Setting up the hard disk type is done automatically by the CMOS
SETUP programs that auto-detects the installed hard disk type settings for optimized per-
formance.