s
-
Description
The USAR UR5HCSPI-SA01
SPICoderTM, a member of USAR’s
H/PC IC product family, is a
keyboard encoder and power
management IC designed
specifically for Handheld PCs
(H/PCs), Web Phones and other
systems that run Microsoft®
Windows CE® and utilize the Intel
StrongARMTMprocessor.
The UR5HCSPI-SA01 offers several
features necessary to H/PCs,
including low power consumption,
real estate-saving size, and special
keyboard modes.
The IC operates at Zero-PowerTM
(less than 2µA @ 3V), providing the
the host system both power
management and I/O flexibility, with
minimal battery drainage. Unlike
the UR5HCSPI-SA, the SA01 does
not offer Lid function.
USAR H/PC ICs family
product specifications
Features
• SPI-compatible keyboard encoder
and power management IC; other
interfaces available
• Ideal for use with the Intel
StrongARMTM processor
• Operates at patented Zero-PowerTM
— typically consuming less than
2µA, between 3-5V
• Offers overall system power
management capabilities
• Available in 10mm by 10mm, 44pin low profile QFP package; other
packaging available
Applications
• Personal Digital Assistants (PDAs)
• Wearable Computers
• Internet Appliance
• StrongARMTM Handheld PCs
• Windows CE® Platforms
• Web Phones
Special keyboard modes and builtin power management features
allow the USAR SPICoderTM SA01
to operate in harmony with the
power management modes of
Windows CE®, resulting in greater
user flexibility, and longer battery
life.
The IC will scan, debounce and
encode an 8 x 14 keyboard matrix.
It communicates with the Host over
the SPI channel, implementing a
high-reliability two-way protocol.
The UR5HCSPI-SA01 also offers
programmable features for wakeup keys and general purpose I/O
pins.
Pin Assignments
PWR_OK
NC0
OSCO
OSCI
Vcc
NC
NC
_RESET
_WKU
Vx
C7
33
34
23
22
QFP
44
12
11
1
UR5HCSPI-SA01-FB
44-pin QFP
(0.80 mm pitch
(10x10 mm)
SPICoderTM is a trademark of USAR Systems, Inc. All
other trademarks belong to their respective companies.
USAR – A Semtech Company
Datasheet
• Implements high-reliability two-way
protocol
• Fully compatible to the WinCE®
keyboard specification
• Works in harmony with the power
management modes of WinCE®
• Provides special modes of
operation for H/PCs, including
programmable “wake-up” keys
• Scans an 8 x 14 matrix; controls
discrete switches and LED
indicators
• Compatible with “system-on silicon”
CPUs for H/PCs
_ATN
_SS
SCK
MOSI
MISO
XSW
SW0
C8
C9
C10/WUKO
C11
s
A Semtech Company
Zero-Power Keyboard Encoder
& Power Management IC for
Intel StrongARMTM H/PCs
C6
C5
C4
C3
C2
C1
C0
R0
R1
R2
R3
r
USAR SPICoderTM SA01 UR5HCSPI-SA01
DOC5-SPI-SA01-DS-103
1
NC
C12
C13
GIO0
_IOTEST
Vss
NC
R7
R6
R5
R4
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Ordering Code
Descri
Package options
44-pin, Plastic PLCC
44-pin, Plastic QFP
Pitch In mm’s
1.27 mm
0.8 mm
TA = -40°C to +85°C
UR5CSPI-SA-FN
UR5CSPI-SA-FB
Block Diagram
MISO
R0-R8
MOSI
SCK
SS
SPI
Communication
Channel
Keyboard
Scanner
ATN
GIO0
Keyboard
Matrix
&
Keyboard
State
Control
C0-C13
Programmable
I/O
PWR_OK
WKUP
IOTEST
WKU
System
Monitor
Input
Signals
Power
Management
Unit
WUKO
XSW
Switch External to Case
SWO
Switch
UR5HCSPI-SA01
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
Wake-Up Keys Only Signal
2
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
Functional Description
The UR5HCSPI-SA01 consists
functionally of five major sections
(see the Functional Diagram on
page 2). These are the Keyboard
Scanner and State control, the
Programmable I/O, the SPI
Communication Channel, the
System Monitor and the Power
Management unit. All sections
communicate with each other and
operate concurrently.
USAR –– A Semtech Company
Pin Definitions
Mnemonic
VCC
VSS
VX
OSCI
OSCO
_RESET
PLCC
44
22
4
43
42
1
QFP
38
17
43
37
36
41
Type
I
I
I
I
O
I
MISO
MOSI
SCK
_SS
_IOTEST
_WKU
R0-R4
R5-R7
C0-C5
C6-C7
C8-C9
C11
C12
C13
34
35
36
37
24
2
13-17
19-21
12-7
6-5
31-30
28
27
26
29
30
31
32
18
42
8-12
13-15
7-2
1,44
26-25
23
21
20
O
I
I
I
O
I
I
I
O
O
O
I/O
O
O
C10/WUKO
29
24
GI00
XSW
SWO
25
33
32
19
28
27
Name and Function
Power Supply: 3-5V
Ground
Tie to VCC
Oscillator input
Oscillator output
Reset: apply 0V to provide orderly
start-up
SPI Interface Signals
Slave Select: If not used tie to VSS
Wake-Up Control Signals
Row Data Inputs
Port provides internal pull-up resistors
Column Select Outputs:
Multi-function pins
I/O C10 & “Wake-Up Keys Only” imput
Miscellaneous functions
I/O General programmable I/O
I
External discrete switch
I
Discrete switch
Power Management Pins
O CPU Attention Output
I
Power OK Input
No Connects: these pns are unused
_ATN
_PWR_OK
NC
38
33
39
34
3,18
39-40
23,40
16,22
NC0
41
35
NC0 should be tied to VSS or GND
Note: An underscore before a pin mnemonic denotes an active low signal.
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Datasheet
DOC5-SPI-SA01-DS-103
3
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Pin Descriptions
VCC and VSS
MOSI, MISO, SCK, _SS, _ATN
C0 to C9 and C11
VCC and VSS are the power
supply and ground pins. The
UR5HCSPI-SA01 will operate from
a 3-5 Volt power supply. To
prevent noise problems, provide
bypass capacitors placed as close
as possible to the IC with the
power supply. VX, where available,
should be tied to Vcc.
These five signals implement the
SPI interface. The device acts as
a slave on the SPI bus. The _SS
(Slave Select) pin must go high
between successive characters in
an SPI message or it will cause a
write collision error. The _ATN pin
is asserted low each time the
UR5HCSPI-SA01 has a packet
ready for delivery. For a more
detailed description, refer to the
SPI Communication Channel
section on page 11 of this
document.
Pins C0 to C9 are bi-directional
pins and are 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.
OSCI and OSCO
OSCI and OSCO provide the input
and output connections for the onchip 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-SA01 into a
known start-up state. The reset
signal can be supplied by any of
the following circuits:
- RC
- Voltage monitor
- Master system reset
_IOTEST and _WKU
The_IOTEST and _WKU pins
(“Input Output Test” and “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 15K resistor, in order to
force the device to exit the stop
mode. A sample circuit is shown
on page 17 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-collector” or “opendrain” outputs). Other
configurations are possible;
contact the factory.
R0-R7
The R0-R7 pins are connected to
the rows of the scanned matrix.
Each pin provides an internal pullup resistor, eliminating the need for
external components.
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Datasheet
DOC5-SPI-SA01-DS-103
4
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
Only” signal, 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 Control” unit, in order to
disable the keyboard and enable
the programmed wake-up keys.
To achieve maximum power
savings, the resistor connected to
WUKO can be as large as 1.5
MOhm.
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Pin Descriptions, Cont.
The Windows CE® Keyboard
C12 and C13
The following illustration shows a typical implementation of a Windows CE®
keyboard.
C12 and C13 are used as
additional column pins in order to
accommodate larger-size
keyboards, such as the Fujitsu
FKB1406 palmtop keyboard. GIO0
is a programmable input/output
switch or LED pin; it can also be
used as a wake-up signal. Its
programming is explained on page
9 of this document.
power
_
esc
1!
2@
3#
4$
5%
6^
7&
8*
9(
0)
-
~
`
Q
W
E
R
T
Y
U
I
O
P
=+
tab
shift
A
S
Z
F
D
X
C
G
V
J
H
B
N
K
M
; :
L
, <
. >
[{
]}
\ |
' "
/ ?
enter
shift
XSW
ctrl
The XSW pin is dedicated to an
external switch. This pin is
handled differently than the rest of
the switch matrix and is intended
to be connected to a switch
physically located on the outside of
the unit.
SW0
The SW0 pin is a dedicated input
pin for a switch.
PWR_OK
alt
Windows CE® does not support the following keyboard keys typically found
on desktop and laptop keyboards:
INSERT
SCROLL LOCK
PAUSE
NUM LOCK
Function Keys (F1-F12)
PRINT SCREEN
If the keyboard implements the Windows key, the following key
combinations are supported in the Windows CE® environment:
The PWR_OK is an active low pin
that monitors the battery status of
the unit. When the UR5HCSPISA01 detects a transition from high
to low on this pin, it will
immediately enter the STOP mode,
turn the LED off and remain in this
state until the batteries of the unit
are replaced and the signal is
deasserted.
Key Combination
Result
Windows
Windows+K
Windows+I
Windows+C
Windows+E
Windows+R
Windows+H
Ctrl+Windows+A
Open Start Menu
Open Keyboard Tool
Open Stylus Tool
Open Control Panel
Explore the H/PC
Display the Run Dialog Box
Open Windows CE® Help
Select all on desktop
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
5
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
“Ghost” Keys
Keyboard Scanner
In any scanned contact switch
matrix, whenever three keys
defining a rectangle on the switch
matrix are pressed at the same
time, a fourth key positioned on
the fourth corner of the rectangle
is sensed as being pressed. This
is known as the “ghost” or
“phantom” key problem.
The encoder scans a keyboard organized as an 8 row by 14 column matrix
for a maximum of 112 keys. Smaller size matrixes can also be
accommodated by simply leaving unused pins open. The UR5HCSPISA01 provides internal pull-ups for the Row input pins. When active, the
encoder selects one of the column lines (C0-C13) every 512 µS and then
reads the row data lines (R0-R7). A key closure is detected as a zero in
the corresponding position of the matrix.
Actual key presses
A complete scan cycle for the entire keyboard takes approximately 9.2 mS.
Each key found pressed is debounced for a period of 20 mS. Once the
key is verified, the corresponding key code(s) are loaded into the transmit
buffer of the SPI communication channel.
Keyboard Scanning
N-Key Rollover
“Ghost”
Key
Figure 1: “Ghost” or “Phantom” Key
Problem
Although the problem cannot be
totally eliminated without using
external hardware, there are
methods to neutralize its negative
effects for most practical
applications. Keys that are
intended to be used in
combinations should be placed in
the same row or column of the
matrix, whenever possible. Shift
Keys (Shift, Alt, Ctrl, Window)
should not reside in the same row
(or column) as any other keys.
The UR5HCSPI-SA01 has built-in
mechanisms to detect the
presence of “ghost” keys.
USAR – A Semtech Company
Datasheet
In this mode, the code(s) corresponding to each key press are transmitted
to the host system as soon as that key is debounced, independent of the
release of other keys.
When a key is released, the corresponding break code is transmitted to the
host system. There is no limitation to the number of keys that can be held
pressed at the same time. However, two or more key closures, occurring
within a time interval of less than 5mS, will set an error flag and will not be
processed. This feature is to protect against the effects of accidental key
presses.
DOC5-SPI-SA01-DS-103
6
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Keyboard States
ND
1) A
=
O
K
s)
(WU ey Pres
K
(
et
Res
Soft
Send Wake-Up
Keys Only
(PW
AND R_OK
=
AND (WUK0 1)
=0
(Key
Pres )
s)
Send All Keys
PWR
_OK
PWR_OK
Send No Keys
(PWR_OK = 1) AND (Key Press)
Figure 2: The UR5HCSPI-SA01 implements three modes of keyboard and switch operation.
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,
{(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 UR5HCSPISA01’s normal state of operation,
accepting and transmitting every
key press to the system. This state
is entered after the user powers on
the unit and it 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 Keys”PWR_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-SA01 about
this state transition. While in this
state, the UR5HCSPI-SA01 will
transmit only keys programmed to
be wake-up keys to the system. It
is not necessary for the
UR5HCSPI-SA01 to detect this
transition in real time, since it does
not affect any operation besides
buffering keystrokes.
Entry Conditions:PWR_OK
transition from high to low
DOC5-SPI-SA01-DS-103
1. The LED will be turned off.
Nevertheless, its state is saved
and will be restored after exiting
the disabled state (change of
batteries).
2. The UR5HCSPI-SA01 will enter
the STOP mode for maximum
energy conservation.
3 Stop mode time-out entry will be
shortened to further conserve
energy.
“Send No Keys"
4. While in this state all interrupts
are disabled. The UR5HCSPISA01 will exit this state on the next
interrupt event that detects the
PWR_OK line has been deasserted.e
Exit Conditions: (PWR_OK = 1)
AND (Matrix key pressed OR
Switch OR _WKUP)
USAR – A Semtech Company
Datasheet
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-SA01, which
guarantees that the transition is
performed in real time. While in this
state, the UR5HCSPI-SA01 will
perform as follows:
7
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Key Map for the Fujitsu FKB1406 (UR5HCSPI-SA01)
0
1
LAlt
`
0
2
\
Columns (C0–C13)
6
7
8
3
4
5
LCtrl
FN
Esc
LSft
1
F1
2
F2
T
Del
9
F9
Y
9
10
11
12
0
F10
U
Pad 4
NmLk
I
Pad 5
+
Bk
Enter
13
BkSp
RShift
PgDn
Rows (R0–R6)
1
TAB
Q
W
Z
CapLk
E
R
O
Pad 6
P
Ins
[
Pause
]
ScrLk
K
Pad 2
L
Pad 3
;
PrtScr
‘
SysReq
PgUp
G
H
J
Pad 1
/
/
Home
Spc
2
3
A
S
D
F
4
X
C
V
B
Pad 0
N
M
,
.
3
F3
4
F4
5
F5
6
F6
7
F7
8
F8
Prog
5
6
End
Keyboard Layout for Fujitsu FKB1406
Esc
@
#
$
%
^
&
1 F2
2 F2
3 F3
4 F4
5 F5
6 F6
7 F7
Q
Del
7
!
Cap
Lock
Fn
Shift
Ctrl
Alt
W
A
E
S
D
Z
X
~
`
:
;
USAR – A Semtech Company
R
C
T
F
V
Y
G
B
*
8
8 F8
U
H
N
J
9 F9
I
4
9
(
1
M0
)
0 F10
O
5
_
+
- Num = Bk
Lk
*
P
6
Ins
K2 L3
<
,
..
>
:
;
{
}
[ Pause
] Scr
Lk
_
+
"
Prt
Scr
'
?
/
/
Sys
Req
Prog
Enter
Shift
Home PgUp PgDn
End
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Key Codes
GIO0 Pin
Key codes range from 01H to 73H
and are arranged as follows:
The UR5HCSPI-SA01 provides a general purpose pin, GIO0, that can be
programmed as Input, Output, Debounced Switch Input or LED Output.
The programmable I/O pin can be configured to the desired mode through
a command from the system. After the I/O pin is configured, the host
system can read or write data to it. If the pin is configured as a
Debounced Switch, it will return scan codes.
Make code = column_number * 8 +
row_number + 1
Break code = Make code OR 80H
For Pin GIO0:
Discrete Switches transmit the
following codes:
I/O Number = 0
LED Number = 0
XSW = 71H
SW0 = 72H
Input Mode
GIO0 = 73H
While in the Input Mode, the GIO0 pin will detect input signals and report
the input status to system as required.
Output Mode
In the Output Mode, the UR5HCSPI-SA01 will control the output signal level
according to the system command. When the pin is set at Output Mode,
the default output is low.
Switch Input Mode
In Switch Input Mode, the UR5HCSPI-SA01 will generate an individual
make key code when the switch closes (pin goes low), and a break key
code when the switch returns to open (pin goes to high). The switches
generate key codes outside of those generated by the key matrix, from
71H - 73H. When the switch closes, the USAR SPICoderTM will not fall
asleep.
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Datasheet
DOC5-SPI-SA01-DS-103
9
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
Pin Configurations
LED Modes
When prototyping, caution should
be taken to ensure that
programming of the GIO0 pin does
not conflict with the circuit
implemented. A series protection
resistor is recommended for
protection from improper
programming of the pin.
After a power-on or soft reset,
GIO0 defaults to the Input state.
The following drawing illustrates
the suggested interface to the
general purpose input/output pin.
Input
Output
GIX
GIX
Circuit
determined by
the specific
application
Series
protection
resistor
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Circuit
determined by
the specific
application
Switch
1
2
3
meta blink count
on
on
on
on
off
off
off
off interval
on interval
meta blink off
1 blinking cycle
Figure 4: Timing chart: the behavior of an LED using the settings,1: LED on; 0: LED off.
There are three LED modes: off, on, and blinking. The LED can be
individually set to one of these modes. In the Blinking Mode, both the oninterval and the off-interval can be individually set. Additionally, a meta
blink count and meta blink interval may be specified. This describes an
interval of a different length which may be inserted after each specified
number of blinks. All the intervals are based on a 1/16th of a second
duration. When the LED is on or blinking, the USAR SPICoderTM will not
enter the STOP Mode unless the PWR_OK signal is asserted low. In this
case, the device will save the status of the LED and turn it off. The default
LED mode is off.
The above timing chart describes the behavior of an LED using these
settings,1: LED on; 0: LED off.
150K
_WKU
LED
_IOTEST
GIX
15K
GIX
Wake-up
interrupt
generating
switch
Figure 3: Suggested interface of general
purpose input/output pin
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Datasheet
on
DOC5-SPI-SA01-DS-103
10
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
SPI Communication Channel
SPI data transfers can be performed at a maximum clock rate of 500 KHz. When the UR5HCSPI-SA01 asserts the
_ATN signal to the host Master, the data will have already been loaded into the data register waiting for the clocks
from the master. One _ATN signal is used per each byte transfer. If the host fails to provide clock signals for
successive bytes in the data packet within 120 mS, the transmission will be aborted and a new session will be
initiated by asserting a new _ATN signal. In such a case, the whole packet will be re-transmitted.
If the SPI transmission fails 20 times consecutively, the synchronization between the master and slave may be lost.
In this case, the UR5HCSPI-SA01 will enter the reset state.
When CPHA = 0, the shift clock is the OR of _SS with SCK; therefore, _SS must go high between successive
characters in an SPI message. The master can assert _SS low only when it is getting ready to transmit or receive.
After the last bit is shifted out, _SS must go high within 60 µS.
The UR5HCSPI-SA01 implements the SPI communication protocol according to the following diagram:
CPOL = 0 ---------- SCK line idles in low state
CPHA = 0 ---------- SS line is an output enable control
Figure 5: SPI Communication Protocol
When the host sends commands to the keyboard, the UR5HCSPI-SA01 requires that the minimum and maximum
Figure 6: Transmitting Data Waveforms:
Figure 7: Receiving Data Waveforms
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Datasheet
DOC5-SPI-SA01-DS-103
11
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Data/Command Buffer
SPI Communication Table
The UR5HCSPI-SA01 implements a
data buffer that contains the key
code/command bytes waiting to be
transmitted to the host. If the data
buffer is full, the whole buffer will
be cleared and an "Initialize"
command will be sent to the host.
At the same time, the keyboard will
be disabled until the "Initialize" or
"Initialize Complete" command from
the host is received.
The following table describes the specific timing referenced in diagrams
on page 12.
Signal Name
tATN:SA _
TSCK
tSS:HD
tWKUP
tSCK:SA
tIB
Description
ATN to first clock pulse
Clock period
Last clock pulse to _SS de-asertion
_WKUP pulse width
_WKUP to first clock pulse
Inter-byte period
Min
2
125
5
0.2
Max
120
60
150
5
Units
mS
µS
µS
nS
mS
mS
Power Management Unit
The UR5HCSPI-SA01 supports two modes of operation. The following table lists the typical and maximum supply
current (no DC loads) for each mode at 3.3 Volts (+/- 10%).
Current
RUN
Typical
1.5 1
Max
3.0
Unit
mA
STOP
2.0
20
µA
Description
Entered only while data/commands are in process and if the LEDs
are blinking
Entered after 125 mS of inactivity if LEDs islow
Power consumption of the keyboard sub-system will be determined primarily by the use of the LEDs. While the
UR5HCSPI-SA01 is in the STOP mode, an active low Wake-Up Output from the Master must be connected to the
edge-sensitive _WKU pin of the UR5HCSPI-SA01. This signal will be used to wake up the UR5HCSPI-SA01 in
order to receive data from the Master host. The Master host will have to wait a minimum of 5 mS prior to providing
clocks to the UR5HCSPI-SA01. The UR5HCSPI-SA01 will enter the STOP mode after a 125 mS period of keypad
and/or host communications inactivity, or anytime the PWR_OK line is asserted low by the host. Note that while one
or more keys are held pressed, the UR5HCSPI-SA01 will not enter the STOP mode until every key is released.
-
Keyboard
Switch
Input transaction
System wake-up
Stop
After Reset
or 125 mS of
inactivity
Run
While processing
current task
and/or LED(s)
are active
- After 125 mS of
inactivity and LEDs
are off
Figure 8: The Power States of the UR5HCSPI-SA01.
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
12
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Communication Protocol
There are eight commands that may be sent from the UR5HCSPI-SA01 to the host, and ten commands that may be
sent from the host to the UR5HCSPI-SA01.
Each command from UR5HCSPI-SA01 to the host is composed of a sequence of codes. All commands start with
<CONTROL> code (80H) and end with LRC code (see the description of the LRC calculation on page 14).
Command details are listed below.
Commands to the Host - Summary
Command Name
Code
Initialize Request
AOH
Initialize Complete
A1H
Heartbeat Response
A2H
Identification Response
F2H
LED Status Report
A3H
Resend Request
A5H
Input/Output Mode Status Report
A7H
Input/Output Data Report
A8H
Description
Sent to the host when the data buffer is full
Issued upon completion of the “Initialize” command issued by the host
Response to “Heartbeat Request” issued by the host
Response to “Identification Request” issued by the host
Response to “LED Status Request”
Issued upon error during the reception of a packet
Reports the status of GIO0 pin
Response to “I/O Data Request” command from the host
LRC Calculation
Commands to the Host Analytically
The LRC is calculated for the
whole packet, including the
Command Code and the
Command Prefix. The LRC is
calculated by first taking the
bitwise exclusive OR of all bytes
from the message. If the most
significant bit (MSB) of the LRC is
set, the LRC is modified by
clearing the MSB and changing
the state of the next most
significant bit. Thus, the Packet
Check Byte will never consist of a
valid LRC with the most significant
bit set.
Initialize Request:
<CONTROL>
<INIT>
<LRC>
The UR5HCSPI-SA01 will send
when its data buffer is full.
80H
A0H
20H
the Initialize Request Command to the host
Initialization Complete
<CONTROL>
80H
<INIT COMPLETE>
A1H
<LRC>
21H
The UR5HCSPI-SA01 wil send the Initialize Complete Report to the host
when it finishes the initialization caused by Initialize Command from the
host.
Heartbeat Response:
<CONTROL>
80H
<ONLINE>
A2H
<LRC>
22H
The UR5HCSPI-SA01 will send the Heartbeat Response to the host when it
receives the Heartbeat Request Command from the host.
Identification Response:
<CONTROL>
80H
<ID>
F2H
<Vendor>
02H
--- USAR
<Revision>
08H
--- Rev 0.8A
<Switch>
00H
.
<LRC>
7EH
The UR5HCSPI-SA01 will send the Identification Response to the host
when it receives the Identification Request Command from the host.
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
13
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
LRC Calculation, Cont.
The following C language function
is an example of an LRC
calculation program. It accepts
two arguments: a pointer to a
buffer and a buffer length. Its
return value is the LRC value for
the specified buffer.
char Calculate LRC (char buffer,
size buffer)
{
char LRC;
size_t index;
/*
* Init the LRC using the first two
message bytes.
*/
LRC = buffer [0] ^ buffer [1];
/*
* Update the LRC using the
remainder of the buffer.
*/
for (index = 2; index < buffer; index
++)
LRC ^ = buffer[index];
/*
* If the MSB is set then clear the
MSB and change the next most
significant bit
*/
if (LRC & 0x80)
LRC ^ = 0xC0;
/* * Return the LRC value for the
buffer.*/}
USAR – A Semtech Company
Datasheet
USAR –– A Semtech Company
Commands to the Host from the UR5HCSPI-SA01, Cont.
LED Status Report
<CONTROL>
<LED>
<Status 0>
80H
A3H
xxH
<Status 1>
xxH
<Status 2>
xxH
LED0 status:( 0=OFF; 1=ON;
2=BLINKING; 3=NO LED MODE )
LED1 status:( 0=OFF; 1=ON;
2=BLINKING; 3=NO LED MODE )
LED2 status:( 0=OFF; 1=ON;
2=BLINKING; 3=NO LED MODE)
<LRC>
xxH
The UR5HCSPI-SA01 will send the LED Status Report to the host when it
receives the LED Status Request Command from the host.
Resend Request
<CONTROL>
80H
<RESEND>
A5H
<LRC>
25H
The UR5HCSPI-SA01 will send this Resend Request Command to the host
when its command buffer is full, or if it detects either a parity error or an
unknown command during a system command transmission.
Input/Output Mode Status Report
<CONTROL>
80H
<MODIO>
A7H
<IO NUMBER>
xxH
IO number, 0
<IO MODE>
xxH
IO mode: (0=input; 1=output;
2=switch; 3=LED )
<LRC>
xxH
The UR5HCSPI-SA01 will send the I/O Mode Status Report to the host
when it receives the I/O Mode Status Request Command from the host, in
order to report the status of the GIO0 pin.
Input/Output Data Report
<CONTROL>
80H
<MODIO>
A8H
<IO NUMBER>
xxH
IO number, 0
<IO DATA>
xxH
IO data: ( 0=low, 1=high )
<LRC>
xxH
The UR5HCSPI-SA01 will send the I/O Data Report to the host when it
receives the I/O Data Request Command from the host.
DOC5-SPI-SA01-DS-103
14
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Commands from the Host to the UR5HCSPI-SA01
Each command to UR5HCSPI-SA01 is composed of a sequence of codes. All commands start with <ESC> code
(1BH) and end with the LRC code (bitwise exclusive OR of all bytes).
Commands from the Host - Summary
Command Name
Code
Initialize
AOH
Initialization Complete
A1H
Heartbeat Request
A2H
Identification Request
F2H
LED Status Request
A3H
LED Modify
A6H
Resend Request
A5H
Input/Output Mode Modify
A7H
Output Data to I/O pin
A8H
Set Wake-Up Keys
A9H
Description
Causes the UR5HCSPI-SA01 to enter the power-on state
Issued as a response to the “Initialize Request”
The UR5HCSPI-SA01 will respond with “Heartbeat Response”
The UR5HCSPI-SA01 will respond with “Identification Response”
The UR5HCSPI-SA01 will respond with “LED Status Response”
The UR5HCSPI-SA01 will change the LED accordingly
Issued upon error during the reception of a packet
The UR5HCSPI-SA01 will modify or report the status of the GIO0 pin
The UR5HCSPI-SA01 will output a signal to the GIO0 pin
Defines which keys are “wake-up” keys
Commands from the Host to the UR5HCSPI-SA01 Analytically
Initialize:
<ESC>
1BH
<INIT>
A0H
<LRC>
7BH
When the UR5HCSPI-SA01 receives this command, it will clear all buffers and return to the power-on state.
Initialization Complete
<ESC>
1BH
<INIT COMPLETE>
A1H
<LRC>
7AH
When the UR5HCSPI-SA01 receives this command, it will enable transmission of keyboard data. Keyboard data
transmission is disabled if the TX output buffer is full (32 bytes). Note that if the transmit data buffer gets full the
encoder will issue an "Initialize Request" to the host.
Heartbeat Request
<ESC>
1BH
<ONLINE>
A2H
<LRC>
79H
When the UR5HCSPI-SA01 receives this command, it will reply with the Heartbeat Response Report.
Identification Request
<ESC>
<ID>
<LRC>
the UR5HCSPI-SA01 will reply
1BH
F2H
29H
to this command with the Identification Response Report.
LED Status Request
<ESC>
1BH
<LED>
A3H
<LRC>
78H
When UR5HCSPI-SA01 receives this command, it will reply with the LED Status Report.
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
15
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Commands from the Host to the UR5HCSPI-SA01, Cont.
Set Wake-Up Keys:
<ESC>
1BH
<SETMATRIX>
A9H
<COL0>
xxH
(R7 R6 R5 R4 R3 R2 R1 R0
Bitmap: 0-enabled 1-disabled)
<COL1>
xxH
<COL2>
xxH
<COL3>
xxH
<COL4>
xxH
<COL5>
xxH
<COL6>
xxH
<COL7>
xxH
<COL8>
xxH
<COL9>
xxH
<COL10>
xxH
<COL11>
xxH
<COL12>*
xxH
<COL13>*
xxH
<SWITCHES>
xxH
(where SWITCHES bit assignments
are = x x x x GIO0 SW0 XSW)
<LRC>
xxH
The "Set Wake-Up Keys" command
is used to disable specific keys
from waking up the host. Using
this command, the host can set
only a group of keys to act as
"power-on" switches. The host can
change the keyboard behavior
dynamically according to the
system power management
requirements. The default after
power on is “All Keys Enabled.”
LED Modify
<ESC>
<MODLED>
<LED NUMBER>
<LED STATE>
1BH
A6H
xxH
xxH
<ON INTERVAL>
xxH
<OFF INTERVAL>
xxH
<META COUNT>
xxH
<META INTERVAL>
xxH
LED number (0)
(0=LED OFF; 1=LED ON; 2=LED
BLINKING)
Time in 1/16ths of a second for
LED to be on
Time in 1/16ths of a second for
LED to be off
Number of blinks after which to
apply meta blink interval
Time in 1/16ths of a second for
LED to be off after <META
COUNT> blinks
<LRC>
xxH
When the UR5HCSPI-SA01 receives this command, it will change the LED
mode accordingly.
I/O Mode Modify
<ESC>
<MODIO>
<IO NUMBER>
<IO MODE>
1BH
A7H
xxH
xxH
IO number: 0
IO mode: ( 0=input, 1=output,
2=switch, 3=LED, 4=current mode
request)
<LRC>
xxH
When UR5HCSPI-SA01 receives this command, it will change the I/O pin's
mode accordingly. If the <IO MODE> =4, the UR5HCSPI-SA01 will send
the I/O Mode Status Report to the host.
Output Data to I/O Pin
<ESC>
<MODIO>
<IO NUMBER>
<IO DATA>
1BH
A8H
xxH
xxH
IO number: 0
IO data: ( 0=low, 1=high,
2=current I/O data request)
<LRC>
xxH
When UR5HCSPI-SA01 receives this command, it will change the value of
the output pin accordingly. If the addressed pin is not configured as an
output pin, the command will be ignored. If <IO DATA> =2, the
UR5HCSPI-SA01 will respond by issuing the I/O Data Status Report to the
host.
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
16
MISO
USAR – A Semtech Company
Datasheet
SCK
_W KUP
15K
150K
DOC5-SPI-SA01-DS-103
GND
NC0
VSS
Vss
PWR_ OK
1MOhm
UR5HCSPI-SA01-FA
Ceramic resonator circuit
with built in capacitors
38
18
42
37
ATN
46
20
OSC1
40
OSC2
39
2MHz
R7
R6
R5
R4
R3
R2
R1
R0
XSW
SW0
GIO0
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10/WUKO
C11
C12
C13
WKU
IOTEST
Alternatively a 2MHz CMOS
signal can be tied directly
to OSC1
Power OK Signal
36
SS
SCK
RES ET
PWR_ OK
Attention Signal
34
35
VDD
_AT N
_SS
MOSI
MISO
Vin
45
33
30
Vout
MOSI
TC54C4302ECB
Alternatively an RC circuit
or Master Reset Signal
can be used
41
Power OK Signal
VCC
29
28
21
6
5
4
3
2
1
48
47
27
26
25
24
23
22
17
16
15
14
13
12
11
10
15K
15K
WUKO
©1998-1999, USAR Systems Inc.
1.5M
DISCRETE
SWITCH ES
COLUMN
OUTPUT S
TO SWITCH
MATRIX
ROW
INPUTS
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Sample Configuration-UR5HCSPI-SA01
17
Wake Up Signal
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Electrical Specifications
Absolute Maximum Ratings
Ratings
Supply Voltage
Input Voltage
Current Drain per Pin
(not including Vss or Vdd)
Operating Temperature
UR5HCSPI-SA01
Storage Temperature Range
Thermal Characteristics
Characteristic
Thermal Resistance
Plastic
PLCC
Symbol
Vdd
Vin
I
Value
-0.3 to +7.0
Vss -0.3 to Vdd +0.3
25
Unit
V
V
mA
Ta
T low to T high
-40 to +85
65 to +150
°C
Value
Unit
°C per W
Tstg -
Symbol
Tja
°C
60
70
DC Electrical Characteristics (Vdd=3.3 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (I load<10µA)
Vol
0.1
V
Voh
Vdd–0.1
Output High Voltage (I load=0.8mA)
Voh
Vdd–0.8
V
Output Low Voltage (I load=1.6mA)
Vol:
0.4
V
Input High Voltage
Vih
0.7xVdd
Vdd
V
Input Low Voltage
Vil
Vss
0.2xVdd
V
User Mode Current
Ipp
5
10
mA
Data Retention Mode (0 to 70°C)
Vrm
2.0
V
Supply Current (Run)
Idd
1.53
3.0
mA
(Wait)
0.711
1.0
mA
(Stop)
2.0
20
µA
I/O Ports Hi-Z Leakage Current
Iil
+/-10
µA
Input Current
Iin
+/- 1
µA
I/O Port Capacitance
Cio
8
12
pF
Control Timing (Vdd=3.3 Vdc +/-10%, Vss=0 Vdc, Temperature range=T low to T high unless otherwise noted)
Characteristic
Symbol
Min
Max
Unit
Frequency of Operation
fosc
MHz
Crystal Option
2.0
External Clock Option
dc
2.0
Cycle Time
tcyc
1000
ns
Crystal Oscillator Startup Time
toxov
100
ms
Stop Recovery Startup Time
tilch
100
ms
RESET Pulse Width
trl
8
tcyc
Interrupt Pulse Width Low
tlih
250
ns
Interrupt Pulse Period
tilil
*
tcyc
OSC1 Pulse Width
toh, tol
200
ns
*The minimum period tlil should not be less than the number of cycle times it takes to execute the interrupt service routine plus 21 tcyc.
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA01-DS-103
18
USAR SPICoderTM SA01 UR5HCSPI-SA01
USAR H/PC ICs family
product specifications
USAR –– A Semtech Company
Bill of Materials for UR5HCSPI-SA01-FA
Quantity
3
1
1
2
1
Manufacture
Generic
Generic
Generic
Generic
TELCOM
1 AVX
Revised 7/14/99
USAR – A Semtech Company
Datasheet
Part#
15K
150K
11M
1.5K
TC54VC4302ECB713
TC54VC4302ECB713
PBRC-2.00BR
Description
15K Resistor
150K Resistor
1M Resistor
1.5 Resistors
IC Volt Detector CMOS 4.3V SOT23, for 5V Operation
IC Volt Detector CMOS 2.7V SOT23, for 3.3V Operation
2.00MHZ Ceramic Resonator with Built in Capacitors, SMT
DOC5-SPI-SA01-DS-103
19
A Semtech Company
Description
For sales information
and product literature,
contact:
USAR – A Semtech Company
568 Broadway
New York, NY 10012
[email protected]
http://www.usar.com
212 226 2042 Telephone
212 226 3215 Telefax
In Japan:
Semtech Japan
Tel: 81-45-948-5925
Fax: 81-45-948-5930
In Taiwan:
Semtech Asia/Pacific Sales
Tel: 011-886-2-2748-3380
Fax: 011-886-2-2748-3390
Koryo Electronics Co., Ltd.
Telephone +886-2-2698-1143
E-mail [email protected]
In Korea:
Semtech Korea
Tel: 011-82-2-527-4377
Fax: 011-82-2-527-4376
In Europe
Semtech Limited
Tel: +44-1592-630350
Fax: +44-1592-774781
Copyright 1999-2000 USAR – A Semtech Company. All
rights reserved. SPICoder and Zero-Power are trademarks
of USAR Systems, Inc. USAR and the USAR logo are
registered trademarks of USAR – A Semtech Company. All
other trademarks belong to their respective companies.
INTELLECTUAL PROPERTY DISCLAIMER
This specification is provided "as is" with no warranties
whatsoever including any warranty of merchantability,
fitness for any particular purpose, or any warranty
otherwise arising out of any proposal, specification or
sample.
A license is hereby granted to reproduce and distribute
this specification for internal use only. No other license,
expressed or implied to any other intellectual property
rights is granted or intended hereby. Authors of this
specification disclaim any liability, including liability for
infringement of proprietary rights, relating to the
implementation of information in this specification. Authors
of this specification also do not warrant or represent that
such implementation(s) will not infringe such rights.