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UR5HCSPI-06 데이터시트 PDF




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부품번호 UR5HCSPI-06 기능
기능 Zero-PowerTM Keyboard Encoder & Power Management IC for H/PCs
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UR5HCSPI-06 데이터시트, 핀배열, 회로
SPICoderTM 06 UR5HCSPI-06
Zero-PowerTM Keyboard Encoder &
Power Management IC for H/PCs
HID & SYSTEM MANAGEMENT PRODUCTS, H/PC IC FAMILY
DESCRIPTION
The UR5HCSPI-06 keyboard
encoder and power management
IC is designed specifically for
handheld PCs (H/PCs). The off-the-
shelf UR5HCSPI-06 will readily work
with CPUs designed for Windows
CE®, saving OEMs significant
development time and money as
well as minimizing time-to-market
for the new generations of handheld
products.
Three main design features of the
UR5HCSPI-06 make it the ideal
companion for the new generation
of Windows CE® -compatible,
single-chip computers: low-power
consumption; real estate-saving
size; and special keyboard modes.
“Quasi” Zero-PowerTM consumption
(less than 2µA @ 3V), a must for
H/PCs, provides the host system
with both power management and
I/O flexibility, with almost no battery
drainage.
Finally, special keyboard modes
and built-in power management
features allow the SPICoderTM 06 to
operate in harmony with the power
management modes of Windows
CE®, resulting in more user flexibility
and longer battery life.
The UR5HCSPI-06 also offers
programmable features for wake-up
keys and general purpose I/O pins.
FEATURES
• SPI-compatible keyboard encoder
and power management IC with
other interfaces available
• Compatible with Windows CE®
keyboard specification
• Zero-PowerTM — typically
consuming less than 2µA,
between 3-5V
• Offers overall system power
management capabilities
• Compatible with “system-on
silicon” CPUs for H/PCs
• Special keyboard and power
management modes for H/PCs,
including programmable “wake-
up” keys
• Scans, debounces, and encodes
an 8 x 14 matrix and controls
discrete switches and LED
indicators
• Available in a small 44-pin QFP
package
• Custom versions available
APPLICATIONS
• StrongARMTM Handheld PCs
• Windows CE® Platforms
• Web Phones
• Personal Digital Assistants (PDAs)
• Wearable Computers
• Internet Appliance
PIN ASSIGNMENTS
33
34
PWR_OK
NC0
OSCO
OSCI
Vcc
NC
NC
_RESET
_WKU
Vx
C7
44
1
QFP
23
22 NC
C12
C13
GIO0
_IOTEST
Vss
NC
R7
R6
R5
R4
12
11
6
C5 7
C4
C3
C2
C1
C0 12
R0
R1
R2
R3
R4 17
18
1
PLCC
23
40
39
34
29
28
_PWR_OK
_ATN
_SS
SCK
MOSI
MISO
XSW
SW0
C8
C9
C10/WUKO
SPICoder is a trademark of Semtech Corp. All
other trademarks belong to their respective
companies.
Copyright Semtech 1997-2001
DOC5-SPI-06-DS-103
1
www.semtech.com




UR5HCSPI-06 pdf, 반도체, 판매, 대치품
PIN DESCRIPTIONS
VCC and VSS
VCC and VSS are the power
supply and ground pins. The
UR5HCSPI-06 will operate from a
3-5 Volt power supply. To prevent
noise problems, provide bypass
capacitors and place them as
close as possible to the IC with the
power supply. VX, where available,
should be tied to Vcc.
OSCI and OSCO
OSCI and OSCO provide the input
and output connections for the on-
chip oscillator. The oscillator can
be driven by any of the following
circuits:
- Crystal
- Ceramic Resonator
- External Clock Signal
The frequency of the on-chip
oscillator is 2 MHz.
_RESET
A logic zero on the _RESET pin will
force the UR5HCSPI-06 into a
known start-up state. The reset
signal can be supplied by any of
the following circuits:
- RC
- Voltage monitor
- Master system reset
MOSI, MISO, SCK, _SS, _ATN
These five signals implement the
SPI interface. The device acts as a
slave on the SPI bus. The _SS
(Slave Select) pin should be tied to
ground if not used by the SPI
master. The _ATN pin is asserted
low each time the UR5HCSPI-06
has a packet ready for delivery.
For a more detailed description,
refer to the SPI Communication
Channel section on page 9.
_IOTEST and _WKU
Input Output Testand Wake Up
pins control the stop mode exit of
the device. The designer can
connect any number of active low
signals to these two pins through a
17K resistor, in order to force the
device to exit the stop mode. A
sample circuit is shown on page 15
of this document.
All the signals are wire-anded.
When any one of these signals is
not active, it should be floating
(i.e., these signals should be
driven from open-collectoror
open-drainoutputs). Other
configurations are possible;
contact Semtech.
R0-R 7
The R0-R7 pins are connected to
the rows of the scanned matrix.
Each pin provides an internal pull-
up resistor, eliminating the need for
external components.
C0-C9
C0 to C9 are bi-directional pins
connected to the columns of the
scanned matrix. When a column is
selected, the pin outputs an active
low signal. When the column is
de-selected, the pin turns into
high-impedance.
C10/WUKO
The C10/WUKO pin acts
alternatively as column scan output
and as an input. As an input, the
pin detects the Wake-Up Keys
Onlysignal, typically provided by
the host CPU to indicate that the
user has turned the unit off. When
the device detects an active high
state on this pin, it feeds this
information into the Keyboard
State Controlunit, in order to
disable the keyboard and enable
the programmed wake-up keys.
C11/_LID
The C11/_LID pin acts in a similar
manner to the C10/WUKO. This pin
is typically connected to the LID
latch through a 150K resistor, in
order to detect physical closing of
the device cover. When the pin
detects an active low state in this
input, it feeds this information into
the Keyboard State Controlunit,
in order to disable keys inside the
case and enable only switches
located physically on the outer
body of the H/PC unit.
Copyright Semtech 1997-2000
DOC5-SPI-06-DS-103
4
www.semtech.com

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UR5HCSPI-06 전자부품, 판매, 대치품
KEYBOARD STATES
These states of operation refer only
to the keyboard functionality and,
although they are related to power
states, they are also independent of
them.
"Send All Keys"
Entry Conditions: Power on reset,
soft reset, PWR_OK =1,
{(LID=1) AND (WUKO=0)}
Exit Conditions: PWR_OK = 0 ->
"Send No Keys"(WUKO=1) AND
(Key Press) -> "Send Wake-Up
Keys Only"(LID = 0) AND
(WUKO=0) AND (Key Press) ->
"Send XSW Key Only"
Description: This is the UR5HCSPI-
06s normal state of operation,
accepting and transmitting every
key press to the system. This state
is entered after the power-on and is
sustained while the unit is being
used.
“Send Wake-Up Keys Only”
Entry Conditions: (WUKO=1) AND
(Key or Switch press)
Exit Conditions: Soft Reset -> Send
All KeysPWR_OK = 0 -> Send No
Keys
Description: This state is entered
when the user turns the unit off. A
signal line driven by the host will
notify the UR5HCSPI-06 about this
state transition. While in this state,
the UR5HCSPI-06 will transmit only
keys programmed to be wake-up
keys to the system. It is not
necessary for the UR5HCSPI-06 to
detect this transition in real time,
since it does not affect any
operation besides buffering
keystrokes.
(LID = 0) AND (WUK0=0)
Send
XSW Key
Only
AND Key Press
Send All
(LID = 1) AND (WUKO=0) Keys
AND Key Press
WUKO=1
AND Key Press
WUKO =1
AND Key
Press
Soft Reset
(PWR_OK =1)
AND (LID = 0)
AND (WUKO=0)
AND Key Press
PWR_OK
PWR_OK
(PWR_OK =1)
AND (WUKO=0)
AND (LID=1)
AND Key Press
PWR_OK = 0
Send Wake
Up Keys
Only
PWR_OK
(PWR_OK =1) AND Key Press
AND (WUKO = 1)
Send
No Keys
Figure 2: The UR5HCSPI-06 implements four modes of keyboard and switch operation.
“Send No Keys"
Entry Conditions: PWR_OK
transition from high to low
Exit Conditions: (PWR_OK = 1)
AND (Matrix key pressed OR
Switch OR _WKUP)
3. While in this state all interrupts
are disabled. The UR5HCSPI-06
will exit this state on the next
interrupt event that detects the
PWR_OK line has been de-
asserted.e
“Send XSW Key Only"
Description: This state is entered
when a PWR_OK signal is asserted
(transition high to low), indicating a
critically low level of battery
voltage. The PWR_OK signal will
cause an interrupt to the
UR5HCSPI-06, which guarantees
that the transition is performed in
real time. While in this state, the
UR5HCSPI-06 will perform as
follows:
1. The UR5HCSPI-06 will enter the
STOP mode for maximum energy
conservation.
2. Stop mode time-out entry will be
shortened to further conserve
energy.
Entry Condition: (LID=0) AND
(WUKO=0) AND (Key Press)
Exit Condition: (LID=1) AND
(WUKO=0) AND (Key Press) ->
Send All KeysPWR_OK = 0 ->
Send No Keys
(WUKO = 1) AND (Key Press) ->
Send Wake Up Keys Only
Description: This state is entered
upon closing the lid of the device.
While in this state, the encoder will
transmit only the XSW key, which is
located outside the unit. This
feature is designed to
accommodate buttons on the
outside of the box, such as a
microphone button, that need to be
used while the lid is closed.
Copyright Semtech 1997-2000
DOC5-SPI-06-DS-103
7
www.semtech.com

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