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Interface IC. AMRI-1000 Datasheet |
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AMRI-1000
Mobile Navigation Interface IC for Navigation Pad Module
Data Sheet
Description
The AMRI-1000 is a low power multi mode navigation
sense and interface IC designed for use with the AMRS
and AMRT series of navigation pad modules to provide a
mouse-like pointing solution for mobile applications.
www.DataSheet4IUn.caodmdition to mouse-like navigation, the AMRI-1000
combined with AMRS/AMRT navigation pads can be
configured to operate as a four or eight-way switch, a
joystick and a scroll wheel like input device. The IC also
supports combination of mouse and joystick modes for
new navigation experience of e.g. web pages providing
precise link selection with fast panning of web pages.
The operating mode can be dynamically reconfigured
to provide the best user navigation experience for any
active application. For example, the user may select
joystick mode for a game and scroll wheel mode for
phone book scrolling, while menu navigation is done
with the backward compatible 4-way switch mode –
always optimized and user configurable for any applica-
tion.
Versus competing solutions, the AMRI-1000 combined
with Avago’s AMRS/AMRT series navigation pads is
unique in its ability to provide superior tactile feedback
as well as multiple intuitive to use operating modes in a
compact form factor.
Theory of Operation
The AMRS/AMRT series navigation pads are capacitance-
based sensor modules. A sliding disk is held at a center
position by a patent pending pseudo-spring system
when the pointer is not being used. Cursor navigation is
activated when contact with the slider is sensed.
The sliding disk may be moved in any direction with
excellent tactile feedback provided by the pseudo-spring
system. The on-screen pointer tracks the movement of
the sliding disk providing a mobile navigation experi-
ence similar to that provided by a PC mouse.
A selection or clicking operation can be performed by
fully depressing the sliding disk. A dome switch provides
tactile feedback for this operation.
The IC is built in a TQFN package and provides its own
internal clock.
Features
• 360 degree navigation
• Superior tactile response
• Integrated selection switch with tactile feedback
moving with disk
• Dynamically Reconfigurable Multimode operation:
Mouse mode,
Analog Joystick mode,
Hybrid Mouse/Joystick mode,
4-way / 8-way rocker switch emulation modes,
Scroll wheel mode
• Up to 250Hz screen update rate
• Internal clock
• 7 mW operating power1 (footnote: with 25% run rate
while navigating)
• 200 uW standby power with wake on motion2
(footnote: with 1 Hz sampling rate)
• 30 µW power in shutdown mode
• 2.8V Supply Voltage
• 1.8V or 2.8V I/O Voltage
• Compact form factor in standard TQFN package
• Two-wire serial interface or 4-wire SPI interface
(selectable)
Applications
• Mobile Phones and Smart Phones
• Computer Peripherals
• Remote Controls
• PDAs, Sub-Notebook and Laptop PCs
• Mobile Multimedia Players
• Video Game Controllers
Component Image
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Block Diagram
www.DataSheet4U.com
Navigation
Pad
Vdd
Navigation
FW
Configuration
Registers
uProcessor
Analog interface
Motion
Buffer
Vddio
I/O Select
4-wire SPI
or two-
wire
interface
I/O
Motion
Interupt
Power
Down/
reset
IC Package (TQFN) and connections to navigation pad
IC Dimensions (bottom and side view):
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Pinout
Note: I/O = digital input/output A = analog P = power
Pin Pin Name
SPI Two-Wire interface (TWI) I/O
1 IO_SELECT
I/O
2 IO_CLK
SCLK(I) SCL (I)
I
3 IO_MISO_SDA MISO(O) SDA (IO)
I/O
4 IO_MOSI_A0 MOSI(I) A0 (I)
I/O
5 IO_NCS_A1 NCS (I) A1 (I)
I
www.DataSheet46U.com Reserved
7 Reserved
8 Reserved
9 Reserved
10 Reserved
11 XROM_SDA
I
I
O
I
O
I/O
12 XROM_SCK
O
13 MOTION
14 VDD_IO
15 DRIVE
16 GND
17 NC
18 SLIDER_SENSE1
19 SLIDER_SENSE2
20 SLIDER_SENSE3
21 SLIDER_SENSE4
22 Reserved
23 Reserved
24 VDD
25 GND
26 NRST_NSHD
27 GND
28 GND
O
P
O
P
A
A
A
A
A
A
A
P
P
I
P
P
Description
SPI/TWI Select High = SPI
Serial clock signal
TWI mode: SDA (Serial data) signal
SPI mode: MISO (Master in Slave out) signal
Address select when used as TWI, addr[0], 3 states
SPI mode: MOSI (Master out Slave in) signal
Address select when used as TWI, addr[1], 3 states
SPI mode: nCS (Chip select) signal
Connect to VDD_IO 1.8V or 2.8V Nominal
Connect to Ground
No Connection
Connect to Ground
No Connection
If patch code required, connect to a EEPROM (e.g. 24A64) data (SDA) pin,
else leave not connected
If patch code required, connect to a EEPROM (e.g. 24A64) clock (SCL) pin,
else leave not connected
Motion interrupt pin
Supply voltage for logic interface
Analog Drive to center electrode
Connect to Ground
No connection
Analog Sense
Analog Sense
Analog Sense
Analog Sense
No connection
No connection
VDD 2.8V Nominal
Connect to ground
Reset and shutdown
Connect to ground
Connect to ground
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