FIC a985 Manual Do Serviço
Hardware Functional Overview
FIC A985 Service Manual
4-17
4.13 Keyboard and Pointing Device
The Keyboard Subsystem of the notebook is implemented on the Motherboard and Keyboard
Assembly using the ENE KB3886 keyboard controller chip and the Phoenix
MultiKey/M3886L keyboard controller firmware. This chip controls the internal built-in
keyboard, the built-in touchpad pointing device, as well as the external PS/2 keyboard and
mouse port. The keyboard controller allows simultaneous use of both the internal and external
keyboard and PS/2 mouse.
The A985 membrane keyboard is an 86-key IBM 101-key enhanced compatible keyboard
with standard characters and 12 function keys including an embedded numeric keypad. See
Chapter 1 for more information.
The pointing device subsystem consists of the built-in Synaptics touch pad pointing device
module on the system top cover assembly and a pre-programmed Mitsubishi 38869M8 micro-
controller that interfaces the mouse device to the Motherboard. The touch pad module is
connected to battery board through a 6-pin FPC cable. An external PS/2 port also supports the
use of an external PS/2 compatible mouse where the system automatically detects on system
power up and runs both internal and external mouse simultaneously.
The Synaptic touch pad, a pointing device for personal computers, detects the position of a
finger over a touch-sensitive area. To move the cursor, the user lightly slides a finger over the
smooth sensor area. To ‘click’, the user gently taps on the surface.
The ultra-thin module is the thinnest PCB based touchpad available today. It is a capacitive
sensor - the finger is detected by measuring its effect on an array of capacitive lines integrated
into the PC board. The pad senses both the finger’s position and its contact area (X, Y, and Z).
The area of contact is a measure of applied pressure. One side of the module PC board is the
sensor surface; electronic components are mounted on the other side. The sensitive area is
protected by a layer of smooth and durable mylar.
The Synaptic touch pad communicates with the host via a standard PS/2 mouse or trackball
interface. It is fully compatible with the standard Microsoft mouse driver. The module
connector includes the PS/2 signal pins, power supply pins and two connections for external
button switches.
The Synaptic touch pad includes a special “edge-motion” feature that allows the user to
extend a drag operation when the finger reaches the edge of the sensor pad. The cursor
continues to coast in the indicated direction when the finger is held against the edge.
Assembly using the ENE KB3886 keyboard controller chip and the Phoenix
MultiKey/M3886L keyboard controller firmware. This chip controls the internal built-in
keyboard, the built-in touchpad pointing device, as well as the external PS/2 keyboard and
mouse port. The keyboard controller allows simultaneous use of both the internal and external
keyboard and PS/2 mouse.
The A985 membrane keyboard is an 86-key IBM 101-key enhanced compatible keyboard
with standard characters and 12 function keys including an embedded numeric keypad. See
Chapter 1 for more information.
The pointing device subsystem consists of the built-in Synaptics touch pad pointing device
module on the system top cover assembly and a pre-programmed Mitsubishi 38869M8 micro-
controller that interfaces the mouse device to the Motherboard. The touch pad module is
connected to battery board through a 6-pin FPC cable. An external PS/2 port also supports the
use of an external PS/2 compatible mouse where the system automatically detects on system
power up and runs both internal and external mouse simultaneously.
The Synaptic touch pad, a pointing device for personal computers, detects the position of a
finger over a touch-sensitive area. To move the cursor, the user lightly slides a finger over the
smooth sensor area. To ‘click’, the user gently taps on the surface.
The ultra-thin module is the thinnest PCB based touchpad available today. It is a capacitive
sensor - the finger is detected by measuring its effect on an array of capacitive lines integrated
into the PC board. The pad senses both the finger’s position and its contact area (X, Y, and Z).
The area of contact is a measure of applied pressure. One side of the module PC board is the
sensor surface; electronic components are mounted on the other side. The sensitive area is
protected by a layer of smooth and durable mylar.
The Synaptic touch pad communicates with the host via a standard PS/2 mouse or trackball
interface. It is fully compatible with the standard Microsoft mouse driver. The module
connector includes the PS/2 signal pins, power supply pins and two connections for external
button switches.
The Synaptic touch pad includes a special “edge-motion” feature that allows the user to
extend a drag operation when the finger reaches the edge of the sensor pad. The cursor
continues to coast in the indicated direction when the finger is held against the edge.
4.14 Disk Drives Subsystem
The disk drives subsystem, implemented on the Motherboard and on the associated internal
hard disk drive assembly and device bay, provides disk storage for all system software and
user files.
The notebook is equipped with high capacity hard disk drive using Enhanced IDE controller
with LBA (Logical Block Addressing) and Ultra DMA mode support.
The SIS 691 controller chip provides the Primary IDE controller for the internal hard disk,
and the Secondary Master for the CD-ROM.
hard disk drive assembly and device bay, provides disk storage for all system software and
user files.
The notebook is equipped with high capacity hard disk drive using Enhanced IDE controller
with LBA (Logical Block Addressing) and Ultra DMA mode support.
The SIS 691 controller chip provides the Primary IDE controller for the internal hard disk,
and the Secondary Master for the CD-ROM.
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