UR7HCDMP Ver la hoja de datos (PDF) - Semtech Corporation
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UR7HCDMP Datasheet PDF : 12 Pages
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USAR HulaCoderTM UR7HCDMP
Mature
mousecoderTM product
specifications
USAR Systems, Inc.
Autoselect
At power-up the USAR HulaCoderTM
will execute a power-on reset and
determine the mode of operations.
PS/2 Mode
At start-up or upon receiving a
reset command, Clock and Data
lines of the USAR HulaCoderTM can
be pulled to a positive level. The
UR7HCDMP will then wait between
300 and 500 milliseconds before
sending an AAh to the host
followed by a device ID of 00h.
Then the IC will set itself to its
default values, i.e. Incremental
Stream Mode with 1:1 scaling, and
a report rate of 100 Hz. The
device will then disable itself until a
command is sent from the host.
Error Handling
For every correct command or
parameter received from the host,
the UR7HCDMP sends an
Acknowledge (FAh). If an invalid
command or parameter is
received, the UR7HCDMP issues a
Resend Request (FEh). If an
invalid input is again received, the
device transmits an Error Code
(FCh) to the host. Both Error and
Resend Request responses are
sent by the device within 25
milliseconds. The host may not
issue any new commands until
either the USAR HulaCoderTM has
responded or until 25 milliseconds
have elapsed.
Pin Description
Pin Numbers
Mnemonic DIP
CHX
1
RTSIN
2
SEROUT
3
RESETIN
4
GND
5
PS2CLK
6
PS2DAT
7
RIGHTSW 8
LEFTSW
9
MIDDLESW 10
D/A-0
11
D/A-1
12
D/A-2
13
VCC
14
OSCOUT
15
OSCIN
16
PWRON
17
CHY
18
SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TYPE
Analog Input
I/O
O, Open Drain
I
Power
I/O
I/O
I w/ Pullup
I w/ Pullup
I w/ Pullup
O
O
O
Power
O
I
O
Analog Input
Name and Function
Horizontal Input
RTS Sense, Power Save Out
Serial Tx Data
Reset: apply 0 V for orderly start
up.
Ground
PS/2 Clock
PS/2 Data
Right Switch: Low = On.
Left Switch: Low = On.
Middle Switch: Low=On.
Resolution enhancement
D/A: LSB.
Resolution enhancement
D/A
Resolution enhancement
D/A: MSB.
Power Supply
Oscillator Output
Oscillator Input
Sensor Power Strobing
Control
Vertical Input
Pin Description Notes
The Internal Oscillator has a built-in feedback resistor. Only one (1)
external component is needed for Clock generation. USAR recommends a
4.00 MHz Ceramic Resonator with built-in load capacitors.
RIGHTSW, LEFTSW, and MIDDLESW inputs have built-in pull-up resistors.
No additional components are required for a three-button design.
However, if high levels of ESD and EMI are expected, than series
protection resistors (47 Ohms to 1k Ohms) are recommended between the
switches and the switches’ inputs on the IC.
USAR Datasheet
DOC7-DMP-DS-102
3
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